53
5,700 cc
I have the same heads and from the info I found they 76cc heads with 1.72 intake valves
54cc
58
305 heads work on a 350 engine
Change cylinder heads to a bigger negative cc (ie. -22,-38), or work the high port on your heads to a larger cc (ie. 58cc to a 70cc.)
283 cubic inches, which works out to to 4.6 litres or so.
58.cc low torque swirl chamber head
which part? every type of nut or bolt is different
Not significantly since cc range is pretty small however chamber size or milling the heads can make major changes to your compression ratio and horsepower..
3998993 is from 72 or 73 307 or 350. 75 cc chambers.