1976 gmc c30
 

Long time watcher, first time poster.
I have joined this forum over the years in multiple forms and always wanted to get my hands on a LHD truck.
Well finally got one a few months ago and slowly making some changes.

its a 454 GMC C30 and runs pretty well.
Wondering a few things:
What kind of diff would be in it and ratio?
Will a weiand 177 or 144 fit under the hood you think?
Who is someone you trust in the USA for adapters to run semi wheels?

Anyway, good to be apart of the crew.

Re: 1976 gmc c30
 

A few more photos

Re: 1976 gmc c30
 

:welcome2:

Re: 1976 gmc c30
 

Beautiful truck. I would assume at least a 4.11 gear, if not lower like 4.56 or 4.88. Not sure about your other questions. Welcome to the board.

Re: 1976 gmc c30
 

Awesome looking truck!

Re: 1976 gmc c30
 

Regular cabs almost always had the 4.11 as they were typically not the hd tow vehicles crews were. They were used more as work trucks. 3+3's usually got the deepest gears of the C30's.

A 144 or 177 can fit under the hood, but it works much easier with a 2 inch cowl. The flat hood chokes off air due to the drop base air cleaners with shorter filters.

If I was spending that kind of money. I would seriously consider a 6-71 or 8-71. Your low compression big block can take what they can dish out. Plus when you open the hood. It won't matter if your bald, have skinny arms, chicken legs, and or anything else. You'd have a blower. The larger blowers are not that much more and you will still need all the same accessories to make work. So cost increase to me is worth it. The 144's or 177's work great on sbc's, but get a bit small for a big block. Also if you do the blower. Budget in a blower cam. It really wakes up engines on boost, and they work quite a bit better around town too.

Re: 1976 gmc c30
 

Brilliant!!

Thanks for the info.

Re: 1976 gmc c30
 

OK, Bags are ordered and just trying to sort out the gas tank situation.

Which year model suburban tanks fit between the rails at the back? i want to keep it all under the bed floor

Re: 1976 gmc c30
 

The diff. Would be a dana 70

Re: 1976 gmc c30
 

Well after a lengthy stay at a shop that was far too slow i have pulled it. and it will be finished end of month. Just need some new wheel caps and we are good to go!!