Thread: 427 tall deck combo question

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Originally Posted by LuckyBadAzzBoy

you did buddy and i appreciate it but now my knuckle head son got a hair up his butt and got a 4.250 stroke crank that he wants in there when i already had the parts for the 427 crank. so what can i do with that. I'm about to quite on it and let him handle it on his own. the whole project was suppose to be for a cruiser that's turning into a strip car that he probably would never take to the track.

if you used the 4.250 crank then your need to run a 400 long rod then you will have a CH of 1.520 piston same as a 9.800 block with a 4.250 crank with a stock rod 6.135 SRP number 258266 or some thing like that with a CH of a 1.520. or a 6.800 rod with a CH of 1.270 and SRP number 258243 they are domes i look up and a 060 over bore but the CH is what you need to look at and what size rod your going to use. you can build the 4.250 crank with stock rods in the 9.800 but not with the 10.200 block. get ready to spend money a stock 427 pistons will not work with the 4.250 crank or a 454 pistons the 427 pistons would need 075 off them with a 6.385 rod and you could not getway with cutting off that much off the top of the piston or a custom set of rods they start at $1800. then your 427 pistons would need to have S locks to hold your pins in and could hit the counter weights of the crank on The come around so it would be way better to buy a piston for the job at hand using a self rod like 6.535 or 6.800