I'll bet you cant run 9:1 comp. with a 235/261. Back in the early '60s you couldnt run the regular gas available then which had to be more than 87 octane.
A 235 headed bored 261 which would be in the upper 8's to one would not tolerated it on regular, too much pinging.
Current 261 ownwers correct me if that dont apply today.
Also TRW (maybe now Clevite) had a TP-115 cam with 228/234 @.050 and .404/.410 lift. good cam but NO ROUGH IDLE (darn it) as installed it had 10 degrees advance for good bottom end(at the expense of top end. It ran good with the stock 'vette triples.
Last edited by edski; 02/05/11 02:32 PM. Reason: cam
