saving a 1982 250 six - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**MikeB** · 07-28-2014, 12:45 PM

I bought my 82 C-10 earlier this year, knowing nothing about sixes and the dreaded integrated cylinder head & intake manifold. Based on manifold vacuum of 20-21 inches at idle, I doubt the intake is leaking, but I know the exhaust manifold has at least one small crack which shows signs of leaking.

The engine idles and runs OK until I get on the gas and the carb's secondary kicks in. At that time the engine falls on its face, like it's getting more air but no more fuel. The carb has a reman sticker on it and doesn't look that old, but somethings not right. Guess I could do a rebuild, but it looks to be a PITA to work on and is virtually non-adjustable. Not to mention I just hate the looks of the P.A.I.R. system with its tubes, check valves, and funky valve cover

So, I can do 2 things here:

1) Install a non-intregated head and manifolds from an earlier model truck, along with a 1-bbl carb. (Or possibly a small 4-bbl manifold and headers or split manifolds.)

2) Install a free 305 that's supposedly in good shape.

If I go the 305 route, I will need to buy an intake manifold, carb, water pump, fuel pump, distributor, exhaust manifolds/headers, etc. (Wish I still had the ones I've sold and given away over the years!)

But if I stick with the six, I will probably spend as much or more on cylinder head, manifolds, and carb, not to mention rings and bearings at the minimum.

Question: What year(s) head, intake manifold, exhaust manifold, and carb should I look for? Being over 25 years old, the truck does not have to pass an emissions test in Texas.

Comments?

Old Truck Man · 07-28-2014, 01:04 PM

You could make a adapter to convert the engine to a 1 bbl carb. or even a 2gc Rochester 2 bbl. The gasket between the exhaust manifold & head is a thick stainless steel one. the bolts that hold it run through the head from the top. you can plug those air pipes & change the camel hump valve cover for a standard one.

07-28-2014, 12:45 PM	#1
MikeB Senior Member Join Date: Jul 2000 Location: North Texas Posts: 3,425	saving a 1982 250 six I bought my 82 C-10 earlier this year, knowing nothing about sixes and the dreaded integrated cylinder head & intake manifold. Based on manifold vacuum of 20-21 inches at idle, I doubt the intake is leaking, but I know the exhaust manifold has at least one small crack which shows signs of leaking. The engine idles and runs OK until I get on the gas and the carb's secondary kicks in. At that time the engine falls on its face, like it's getting more air but no more fuel. The carb has a reman sticker on it and doesn't look that old, but somethings not right. Guess I could do a rebuild, but it looks to be a PITA to work on and is virtually non-adjustable. Not to mention I just hate the looks of the P.A.I.R. system with its tubes, check valves, and funky valve cover So, I can do 2 things here: 1) Install a non-intregated head and manifolds from an earlier model truck, along with a 1-bbl carb. (Or possibly a small 4-bbl manifold and headers or split manifolds.) 2) Install a free 305 that's supposedly in good shape. If I go the 305 route, I will need to buy an intake manifold, carb, water pump, fuel pump, distributor, exhaust manifolds/headers, etc. (Wish I still had the ones I've sold and given away over the years!) But if I stick with the six, I will probably spend as much or more on cylinder head, manifolds, and carb, not to mention rings and bearings at the minimum. Question: What year(s) head, intake manifold, exhaust manifold, and carb should I look for? Being over 25 years old, the truck does not have to pass an emissions test in Texas. Comments? __________________ Mike 1969 C10 LWB -- owned for 34 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 23 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then!

07-28-2014, 01:04 PM	#2
Old Truck Man Registered User Join Date: Feb 2014 Location: Pocahontas Arkansas Posts: 684	Re: saving a 1982 250 six You could make a adapter to convert the engine to a 1 bbl carb. or even a 2gc Rochester 2 bbl. The gasket between the exhaust manifold & head is a thick stainless steel one. the bolts that hold it run through the head from the top. you can plug those air pipes & change the camel hump valve cover for a standard one.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.