Quote:
Originally Posted by MARKDTN
That is a beautiful car!
FYI-But same foundation is only if you squint really hard. Might both have an 010 casting 350 block but that is where the similarities start to fade. A 1972 LT1 is 9:1 compression (in '71 it was 11:1), 4 bolt mains, steel crank shaft, solid lifter engine. A 1972 Biscane 350 is 8.5:1 compression, 2 -bolt mains, Cast crank, hydraulic lifter engine. All those things interchange for the most part, but are much more heavy duty and/or performance oriented for the LT1. LT1 also had a bigger oil pan, windage tray, different timing chain, better connecting rods, and so forth than the low HP 350s that year.
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Thx, but if he has 487 heads he does not have 11:1 compression with 76cc heads, basically the same foundation as the 72. 1970 had 64cc heads and 11:1 compression with the LT1 either corvette or Z28. The difference lies there. Basically the 71& 72 were the same. Also in 72 they changed how they rated the hp from the crankshaft to the rear wheels so the 72 numbers looked much lower but were basically the same as 71.
Here are the head specs for 71 & 72 Z28: 3973487 comes up as s good for '71 or '72 Z/28 head at 2.02/1,6 valves and a 75.47 cc chamber.