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GMC V6 and V12 Engines Engine repair and rebuilding

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  #31  
Old February 7th, 2017, 01:56 AM
bigblockv6 bigblockv6 is online now
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Default Re: Project Blown 305

Just remember that the V12 has different intake manifolds due to spacing and they will not interchange with the V6
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  #32  
Old February 7th, 2017, 02:16 AM
atomman atomman is offline
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Default Re: Project Blown 305

That is an issue with the magnum heads. Correct?
Atomman
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  #33  
Old February 7th, 2017, 02:47 PM
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Default Re: Project Blown 305

No That is an issue regardless of heads You simply can't use V6 intake manifolds on the V12 nor can you use V12 intake manifolds on the V6.
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  #34  
Old February 7th, 2017, 03:28 PM
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Default Re: Project Blown 305

Found a blower off a 6-71.....might be to small though.

https://medford.craigslist.org/pts/5946781139.html
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  #35  
Old February 8th, 2017, 02:59 AM
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Default Re: Project Blown 305

Nice! I'm hoping my neighbor will sell me the 8v71 he has for a reasonable priced that one was pretty expensive.

If the intake is close I wouldn't mind modifying it to work I'm just curious what it looks like.
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1936 Chevy master coupe 401/st400
1966 C20 350/sm420 (planning-blown 305/sm465 4x4)
1967 Chevelle (4.6L 4V/t56)
1971 Triumph Stag 3.0 v8/4 speed
1971 Cutlass 350olds/350
1975 Trans am 455/t56
1991 300zx TT/5 speed
1992 Celica GT (soon to be 3.5L/5 speed)
1999 F150 4.6/4w75 (soon to be supercharged)
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  #36  
Old February 12th, 2017, 03:16 AM
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Default Re: Project Blown 305



Thanks to Atomman I now am a little bit closer to getting this project off the ground!
Now I just have to wait for it to arrive and figure out which blower I need!

Very excited!
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1936 Chevy master coupe 401/st400
1966 C20 350/sm420 (planning-blown 305/sm465 4x4)
1967 Chevelle (4.6L 4V/t56)
1971 Triumph Stag 3.0 v8/4 speed
1971 Cutlass 350olds/350
1975 Trans am 455/t56
1991 300zx TT/5 speed
1992 Celica GT (soon to be 3.5L/5 speed)
1999 F150 4.6/4w75 (soon to be supercharged)
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  #37  
Old February 12th, 2017, 03:24 AM
bigblockv6 bigblockv6 is online now
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Default Re: Project Blown 305

That looks fantastic
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  #38  
Old February 13th, 2017, 03:26 AM
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Default Re: Project Blown 305

__________________
"Excuse the rust I use my truck"
1964 GMC 1500 305E/sm420 4 barrel intake mod and dual exhaust.
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

1964 Chevy C20 292/SM420
1966 Chevy C10 292 hotrod 6/TKO600
1977 Chevy C20 572 BBC/TH400
1984 Chevy C30 292/SM465

My youtube channel aka Military Chevy:
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  #39  
Old February 14th, 2017, 05:59 PM
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Default Re: Project Blown 305

Thank you, now having compared to the 6v92 my neighbor has it looks like I'm going to need an 8v71 or 8-71 minimum.

They sell adapter plates for the V style on a normal flange so I may get that since i can avoid trying to drill the angled holes myself and I can drill for a convention 8-71 and be able to swap between em.

We shall see, I'd like to not have too terribly much into making a blower work since you can buy them new/used with a lot of the parts I'd need out of the box.
(Front part with the snout for the pulleys, rear cover etc)
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1936 Chevy master coupe 401/st400
1966 C20 350/sm420 (planning-blown 305/sm465 4x4)
1967 Chevelle (4.6L 4V/t56)
1971 Triumph Stag 3.0 v8/4 speed
1971 Cutlass 350olds/350
1975 Trans am 455/t56
1991 300zx TT/5 speed
1992 Celica GT (soon to be 3.5L/5 speed)
1999 F150 4.6/4w75 (soon to be supercharged)
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  #40  
Old February 23rd, 2017, 01:51 AM
Cuttyman9 Cuttyman9 is offline
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Default Re: Project Blown 305

So here's my plan.

I found a few eBay sellers with blower parts for very reasonable prices

I'll need the blower front cover, the blower rear cover, the snout, the pulleys (which I'll probably buy two to start mock up with them change later) and the adapter to go to the 8v71.
So far I've purchased the adapter, this is already drilled for the angled bolts and includes studs gaskets etc.
I mocked up the stuff a bit.
I'm contemplating cutting off the whole water pump setup to save space and run an external pump, it wouldn't be hard as the pump is cast into the front cover and I'd just need two block off plates to cover the holes and put AN fittings up to them or a spot to clamp a hose. This would also allow me to run only the crank pulley for the alternator (too bad I didn't get the magneto lol)

Turns out they sell new old stock 8v92 blowers for about 600 so I'm hoping that will bolt up the same way the 8v71 does as far as I can tell the engines underneath are the real variance not the blower itself.

Here's the parts needed:








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1936 Chevy master coupe 401/st400
1966 C20 350/sm420 (planning-blown 305/sm465 4x4)
1967 Chevelle (4.6L 4V/t56)
1971 Triumph Stag 3.0 v8/4 speed
1971 Cutlass 350olds/350
1975 Trans am 455/t56
1991 300zx TT/5 speed
1992 Celica GT (soon to be 3.5L/5 speed)
1999 F150 4.6/4w75 (soon to be supercharged)
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