Manifold issue's sbc in a 3100.

Swapped the engine in my 54 GMC. SBC for SBC. The truck is sitting on an S-10 Chassis. Pulled the dying 283 and installed a 50k mile 350 engine. Heres my prob. The passenger side exhaust manifold is the "log" type, It fit the 283, but for some reason... Is too long and the rear exhaust port bolts dont match up! I've mentioned before, "i'm no super mechanic" I also know exhaust issue's are common on the s-10 chassis. Has anyone else had this problem?? Any info/advice as to what why this is? If I can get pics of this, I will post them later. The manifold that came on the 350 engine wont clear my frame, I'm sure there is a solution, maybe notch the frame? Pics or advice will be greatly appriciated. also, anyone else who has this set up, what manifold/header worked best for you??

 

rams horns or block huggers are what you need.

 

I had clearence issues with the "ram horns" on my SBC when I put it in my Plym. I found a dude on ebay that sells factory exhaust manifolds for like $30. There are many different styles I didn't even know about. I ended up getting one that had come off a full size chevy van with a 305. Problem solved. I'll try to find his name for you.

 

eight-two is his seller name on ebay. Hope this helps.

 

This cannot be unless the other manifold didn't fit either!

 

X2! lets see some pic's of said issue.

 

I remember something about the later "metric" 305s & 350s (5.0, 5.7L) having a different rear pass. side exhaust bolt hole for some reason. Possibly had to do with where the collector was placed on the manifold? How far off is it?

 

Not that it matters to your question, but its bugging me so I have to clarify. A '54 GMC is not a 3100. 3100 is a Chevy designation. A 1/2-ton GMC in '1954 is a 100. I'm probably the only one who cares so feel free to ignore this post...

 

Beyond the block huggers which will probably work, ya I know sound like the salesman who sells them, and finding that ebay guy to see different manifolds, you could have the manifold cut at the end and reposition the outlet. Did this on my 39 chevy before they had block huggers, had to clear the steering box. Hacksawed the end off, and then did a pie cut to reposition where the exhaust mount is. Friend of mine brazed it together. Worked like a charm for years.