Project Blown 305

[1972RedNeck]

Originally Posted by TJ's GMC

It's not even that anymore....this new dumb trend is "Buy for cheap, sell for a rip off" or "If it ain't some junk chinese crate 350 that you can get for 2K; it ain't worth nothin."

Seems to be what drives most forums and I'm sick of it. lol People pull out good running v6's and treat them as Junk...yet when one of us Wants it they want over $500!

Experimentation has been done, if you look through old threads here in the 09-12 years it seems like a whole roll of people were into making these things perform....but suddenly they seemed to disappear off the map....probably had to have that dumb 350 or Life got in the way....I have no clue. lol
Even on google! I've done tons of research at just about Every forum and lot's of people had great ideas for these in mind...but all the threads just end without anything ever actually Happening.

So be prepared...even with the advantage of having hot rod parts on the market people are still to stinkin cheap to buy them.

My 292 I6 for instance, TONS of hotrod parts on the market for that, yet you still don't see many around! Oh I forgot to mention....it cost more than a cheap junk crate 350 to build a healthy, unique 292. lol

Taste and Unique is going down the drain anymore....shows are really boring when a line of chevy's and GMC's all have the same engine.

What's worse is people are treating SBC like they're something special, when in reality...they are over used and boring as heck. Only thing that interests me is my 572 big block. haha

I think we would get along quite well.

[1972RedNeck]

Originally Posted by Cuttyman9

I 100 percent agree.

I love being innovative and am shocked that I'm one of the first to attempt this with the full intent and means to make it come together.

I also know people will prolly be slow to throw money out there it's very similar in the celica community. But I figure if I can offer shafts for cheap so people could have their pedestals opened up or if I make new ones. It will all kinda fringe on if it costs me less to make like 5 pairs vs one pair and if it's cheap enough I can sell them relatively quickly.

The rockers could be purchased separate from summit so I wouldn't supply those unless for some reason I can setup as a dealer for Harland sharp or something haha

I wish we lived a bit closer as it would be good to find a great machinist we could both use and sit down over a couple of beers and hash out some definite plans and maybe even pool some funds to make this happen.

[TJ's GMC]

Whatever you come up with keep us posted, Will be one of your customers for sure in the future. lol It'll be a few years before I do my 305 again. But yeah, the 292 in my 66 with make around 310 hp and 340 torque and it's backed by a tko600 5 speed. Will make a great cruiser and tackle some sbc's if I want to. haha

[Cuttyman9]

I know right? Everyone's always so far away but I'm sure the smaller parts can shipped pretty easily.


Definitely will post all of my progress.

I may just model the whole rocker system in cad do I have a starting point.


Sounds like a healthy I6! Prolly going to be a blast with the tko

[TJ's GMC]

72redneck...We probably would. haha


Yeah it should be fun with that trans....3800 pound truck with 3.73 gearing and a close ratio trans should make for some easy burnouts and quick shifting. Plus the way I built the engine it should peak torque around 2500 so it'll be perfect.

[Cuttyman9]

Here's all the info I gathered so far.

Some of it does conflict a bit.


Valve spring
installed height=2.141"
Od 1.367"
Wire od=.0188

Lifter
2.317" tall
0.988" od

Pushrod
7 13/16" long

Shaft
17 7/8"
0.791" od
0.496 id
Multiple 0.1" oil holes
0.335" hole at each end

2 bolt pedestal
2.233" tall
0.385 bolt hole
0.972 hole to hole min
1.119 shaft hole to base
0.791 shafthole

One bolt pedestal
0.147 from small from top to flat
Depth of 0.814"
0.84 from oil hole to round face
Roundface to flat 0.112
0.166 offset boot hole to oil hole

Rocker
2.719" tip to tip
1" thick



Valley cover
19"

Rockers
Width=1.01"
Hole od=0.789"
Distance between= 3.3"
Cap width=1.226"
2.75" length


73-up
28" between rails(inside of C)


702 v12
-3.124" mains (thunderV12.com)
-1.6" pins
-~7" rods
^last two are from (http://www.bangshift.com/forum/forum...cu-in-v6/page2)

Confirmed 1.24" OD wrist pins
2.811 rod journal
^http://www.bangshift.com/forum/forum...3-478-cu-in-v6

-Exhaust Valves
New Old Replacement Stock (NORS) made in USA by TRW.
* Head Dia 1-53/64
* Stem Length 5-13/16
* Stem Dia .434
* Type Grooved
* Seat Angle 45°
TRW SC2330N
GM 2383318
^ebay listing 221603150615

Melling exhaust valve
* Head Diameter: 1.565
Oriellys V0580

Intake valve guide
* Vintage
* Standard Size
* 0.342 Inch I.D.
* 2.75 Inch Overall Length
* Guide Type: Plain
* Inside Diameter (In): 0.342 Inch
* Inside Diameter (mm): 8.687
* Outside Diameter (In): 0.502
* Outside Diameter (mm): 12.751
Oriellys VG5037

Pushrod
* 7.989 Inch Overall Length
Oreillys RP3099

Pushrod
* Diameter (In): 5/16 Inch
* Length (In): 7.645 Inch
Oreillys MPR121





211-2036*CLEVITE intake valve
fits GMC:
351cid v6, 1964-1967, Diesel*Engines, 2.260" Head Diameter
351cid v6,*1966-1969,*2.260" Head Diameter
401cid v6,*1966-1972,*2.260" Head Diameter
432cid v6,*1973-1974,*2.260" Head Diameter
^ebay listing 371009149096

-Intake valve-
* Head Dia 2.160
* Stem Length 5.849
* Stem Dia .3725
* Seat Angle 30°
* Sealed Power V1563
^Ebay listing 221587715714

Intake valve (305)
* Head Dia 2
* Stem Length 5-13/16
* Stem Dia .341
* Seat Angle 30°
* Type Lock Grooved
* TRW V2327
* RMC V3257
OEM GMC 2368098
^ebay listing 321679596667

2474281 pn rod 478
^eBay listing 282243468585

Con Rod Bearings
6200CP
0.020" / .50mm*Con Rod Bearings
OD 3.016"
ID 2.8117"
Length .935"
Wall Thickness .1010/.1015"
^ebay listing 321887078220

"New old stock piston set for GM 351 V6 truck engine from the 60's. *Includes 6 pistons and pins, ring set and pin clips. *
4 9/16 bore,
approx 2 9/16 comp. height,
approx 1 1/4 pins. *
Parts are in good condition."

^ebay listing 322341673092

[TJ's GMC]

Found this for ya:

"Heres a little about these motors I leared back in the mid 80's. My grand father gave me his 1965 GMC 1t 4x4 that came with the gas 351c v6. I rembered from a kid that this old truck would out pull anthing and never broke down. The old 351 was getting tired with about 200k on it so i decided to rebuild it and of coarse hop it up. So I started looking into performance imfo on these motors. That put me in contact with Babe Erson. He told me about the gas 478M motor and how with some work the big 478m v6 will easily make more tork and hp than a mildly built 454bbc. So I bougth a 478m motor from the junk yard and went to work per Babe's rec's. The first thing was to throw away the stock 4 ring pistons and masive rods that weight about the same as a complete hemi motor. I had a crank grinder turn the rod journals down to a much smaller size to fit a 426 hemi rod. I had BRC make some new lighter 3 ring pistons that also raised the cr up from 6.5 to 9.0. Engine dynamitics lightened the crankshaft alot and rebalanced every thing for me. Babe made me a special cam and all the vale train parts. I ported the heads and polished the combustion chambers myself. I also made a sheetmetal cross ram intake with 1 850cfm Q Jet carb and a set of home made 1 3/4" headers. Once I got all the tuning done on this motor it was one tork animal that would rev easily to 5.5k. It broke the transfer case right away so I put in a beffier transfer case out of a newer ford truck I think then I blow the old gmc rear end so I upgraded it to a dana 70 with posi. I also upgraded the old truck 4 speed to a newer 5 speed that could be shifted much faster. I had put big 38" tires on this truck and could smoke them in 2nd gear. It did not do to bad on fuel also at about 12 mpg fully loaded with a 10ft camper and pulling a 30ft inclosed trailer running about 65mph. I wish I know where this truck (James) is today as I would try to get him back."

[Cuttyman9]

**** that's awesome!

I'm hoping I can make that happen!

Maybe I should contact them to see what they say about the motor and give me a better place to start maybe advice on how they were successful.

I'd love to find a 478 block and crank to work with cuz that would bump the size further.

[TJ's GMC]

Originally Posted by Cuttyman9

**** that's awesome!

I'm hoping I can make that happen!

Maybe I should contact them to see what they say about the motor and give me a better place to start maybe advice on how they were successful.

I'd love to find a 478 block and crank to work with cuz that would bump the size further.

I got this off of another forum, but here is the link. Not sure if he's around much or not. haha Subscribed but lost interest there.

http://www.jalopyjournal.com/forum/t...series.153130/


Post #22 is the one. Don't mind the ignorance of the majority. lol

[atomman]

I have an intake for for a blower that was flame cut and needs to be welded together. PM me if interested. I was going to use it on a V-12, that is all machined, I have on the shelf, but it will need two blowers.
Atomman