I am trying to decide what to do engine wise in my 1968 convertible. I am restoring it right now and would like to improve performance of the engine while I have the fenders off and it's easy to remove. At this point I don't want to spend a ton of money as the resto is consuming most of the budget.
The car currently has a good running '69 YE 350 with 11 heads and guessing 254 cam, plain jane 265HP engine but I have put on a 4 bbl years ago.
I just stripped apart a stuck '74 455 with 4X heads and 067 cam, engine is fine but destroyed several pistons getting them out as they were rusted in place, block is fine, original bore, crank and cam are good also. Would need a complete rebuild and probably .030" overbore.
Now I have a lead on a good set of 093 heads which are the '66 389 closed chamber 1.96/1.66 68cc heads and are only a couple hours away. Since the 455 would need a complete rebuild, a good winter project, my thoughts are this and would appreciate some feedback whether this combo would work, or whether mixing 1966 heads with '74 cam and '69 350 is bad.
Using my 350, put in the 067 cam and 093 heads, should get me somewhere around 9.5:1 CR and the 067 is a decent cam. I would guess power would be around 300-320 HP. It would be an easy upgrade for little $$$.
Your thoughts? Are the one year 093 heads good or should I hold out for newer ones from say 67-73 or so, open chamber etc.?
