Quote:
Originally Posted by isphius
blown head gaskets, broken timing chain, wiped out cam lobes, huge vacuum leaks(like brake booster line) valves hanging up or broken/bent, cracked head/block (although youd be losing coolant). Check for milkshake in your oil just to be safe. Just a few things besides fuel and spark. And yeah montes had l69s till 88. I believe every small block changed when they changed the heads over, i could be wrong though. The l69 will fly with a few bolt ons. My camaro had a real HEI distributor(vac advance), a holley 600 or something, performer intake, small tube headers and a few other small things. 5 speeds came with the 3.73s, that combo with the higher-than-normal-305 revving motor, made for a very fun car
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I think you just gave me the answer.........a vacuum leak was one of them I was considering....I think it is the brake one you mention, that might not be hooked up. But like I said...I can't try anything til I get home after graduation in May....which is annoying. The chevy V8 changed from a two piece to one piece rear seal in 1987 and I think that effected some other changes as well. That change alone gave me a hell of a time finding the right clutch for the swap.
I agree with the 5 speed and 3.73 gears, I was just looking at an old Motortrend...imagine my shock when I found that the numbers generated by the L69 with that drivetrain combo was equal to a contemporary Porsche 928 to 60 and the 1/4 mile, and faster than a Corvette, Ferrari 308, and Jaguar XJS V-12, all of the same vintage as the 84 L69 with the T5 and 3.73s or 83s to those same figures
. In all fairness though, the vette was an automatic.
With the 87 LG4 I think I have a 9.3 compression but I don't know. I thought I had an 8.6 until someone said it was 9.3. The engine came out of a Caprice so I do have reason to believe it was 8.6. But if it is a 9.3 motor I won't be losing too much power compared to the original motor.