Not a good idea!
And there's a reason why what looking to do has not been done!
Even if you took the Bore out to .060" over you would still only have a 412 cid motor and the size ( height ) of dome on the piston you would need to get even get a 9 .2 to 1 compression would choke off the flame travel in the chamber and severely limit HP!
If your trying to stay with a iron head then there are many D-port casting that can be ported to well over the stock 245 Intake cfm level of the 455SD heads, and the headers for such are far cheaper also!
If you went with a 4.00" stroke Crank then your idea has a chance of flying.
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs!
And he was not talking about 1/8 or 1/4 mile ETs!
1) 1940s 100% silver 4 cup tea server set.
Two dry rotted 14 x 10 Micky Thompson slicks.
1) un-mailed in gift coupon from a 1972 box of corn flakes.
Two pairs of brown leather flip flops, never seen more then 2 mph.
Education is what your left with once you forget things!
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