i have a 66 383 2 barrel engine. to my understanding it should have 9.2:1. 4 barrel has 10.0:1.i have 516 heads i beleive.so the first question is what are the deck heights below the deck between the 2?im gonna do a garage rebuild on it.the machine shop is only gonna fix what needs to be fixed mainly to clean it and check for cracks.i will either use the 516 heads or get some 452 later heads. 2nd question is which should i do deck the block to acheive the distance of deck height of the 4 barrel version or shave the heads?i would like to run the 452 heads because of the unleaded seats and better flow.or to reach atleast the factory 9.2:1 compression so i wont loose that compression going to the open larger chamber heads?i am also planning on running the comp xe268h cam kit the one with cam lifters double roller timing chain ,valve spring etc..rpm intake,1406 eddelbrock carb,its going in a 66 newport 2 door tank lol.im sure it has highway gears its also a peg leg i know this because i smoked out the block this morning.id like to keep as highway freindly gears on it as possible.they say the cam will be ok with stock stall.how to i balance this out with this heavy car, highway gears and choosing a convertor to match?oh and i have stock manifolds which they say is good with a split duration cam.if i left any info out let me know.thanks will