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1. Check compression -- make sure all cylinders are close to the same. If your engine has 9:1 CR, the compression gauge should read around 120 -135 lbs. If one or more cylinders are down to around 100, you probably have ring or valve problems. 2. Add dual exhausts with 2.25" pipes. 3. Make sure the heat riser valve is opening when it's hot. 4. Make sure mechanical and vacuum advance work properly. 5. Replace plug wires, preferably with spiral wound models. 6. If possible, replace timing chain and oil pump.
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Mike
1969 C10 LWB -- owned for 36 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, recent AAW wiring harness, 5-lug conversion, 1985 spindles and brakes.
1982 C10 SWB -- converted from 250-six to roller cam 350, Vortec heads -- sold
1981 C10 Silverado LWB, 305, TH350C -- 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 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then!
Last edited by MikeB; 10-28-2002 at 01:26 PM.
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