305E Intake mod.

[TJ's GMC]

Got a new intake from Ed Snyder today. Thanks Ed!

So I looked at David Chadwell's 305E manifold modification and it looks like it'll be pretty simple. But, as I don't want to screw this manifold up...lol... Anybody got any tips an tricks? I'll be using a grinder and will be taking off a little at a time. I have a mig welder, and will be getting a carb plate either made or a spacer plate from Napa. Any tips would be awesome guys. Super excited to start working on this!

[bigblockv6]

If you got a Magnum manifold there won't be any need to do any welding, It's all about milling the top surface flat, cutting out a square bore pattern then fitting a carburetor spacer plate and drilling & tapping it. I've built two already and right now I'm building a third one, I'll post some pics.

[bigblockv6]

Ed has just informed me that the manifold is from a 305D.At this point follow what David Chadwell did, that was is engineering expertise and the correct way to make a 4bbl distribute fuel without any restriction

[bobdylan]

Where do I find David Chadwell's modification? Is anyone running Holley 500cfm 2barrel 4412?

[TJ's GMC]

Here's a link to the mod:

http://6066gmcclub.com/album.php?albumid=51

[TJ's GMC]

Originally Posted by bigblockv6

Ed has just informed me that the manifold is from a 305D.At this point follow what David Chadwell did, that was is engineering expertise and the correct way to make a 4bbl distribute fuel without any restriction

Yeah, the manifold is from a 62 D series. I've always enjoyed fabricating so I don't mind the little extra challenge. Long as I don't screw this up beyond repair I'll be ok. haha!

[Ed Snyder]

Originally Posted by TJ's GMC

Yeah, the manifold is from a 62 D series. I've always enjoyed fabricating so I don't mind the little extra challenge. Long as I don't screw this up beyond repair I'll be ok. haha!

After you left yesterday, Tom, I realized that the manifold you bought from me was from the original engine (305D) out of my '62 Suburban that I replaced with a 401.

I'd recommend having a machine shop mill down the top surface for you. Then you could use a grinder to open up the hole and the insides if you're trying to do as much as you can yourself.

[TJ's GMC]

Originally Posted by Ed Snyder

After you left yesterday, Tom, I realized that the manifold you bought from me was from the original engine (305D) out of my '62 Suburban that I replaced with a 401.

I'd recommend having a machine shop mill down the top surface for you. Then you could use a grinder to open up the hole and the insides if you're trying to do as much as you can yourself.

Hi Ed! Thanks for the suggestion. A machinist friend of mine has a mill I believe so I could probably take it to him. Just need to call and make sure I can cause he's always super busy. haha

[TJ's GMC]

Well the thing that really sucks is that all the machinists are going by the way side around here. I've got two more guys to ask, and if they can't, I'm going to have to use a grinder and sander and hope for the best. lol I'll update.

[TJ's GMC]

Hi guys....will a 351 magnum manifold bolt up to a 305E? Got a line on one.