Hello guys i need some help i was wondering how much stroke can u put in a stock big block chevy. what i am doing is a 454 and i want to bore it .030 and put a 4.375 stroke in it. also what is the highest comp that i should run if i want to use a 350 shot of no2. thnks for any help that u can give.  

4.375" should be possible. Keep in mind that capscrew rods usually help gain clearance here and will minimize grinding. It will require a pan with notched pan rails and it might require a little extra grinding at the buttom of the bores. You can't do much grinding on the pan rails of the block though as the main oil galley runs through this area on one side.

I think that pump-gas compression would be fine with a pretty big shot of nitrous as long as you switch in some high octane fuel when you spray. Especially running a 350 shot will require you to run the best fuel you can find.  

thnks for the help does any one have a good setup for a 383 stroker my brther is going to put one in a camaro with a 200 shot of no2  

I say to take the most advantage of the nitrous to use a Victor Jr. intake, a Comp NR276HR cam, and keep the compression around 9.0-9.5:1.  

thnks for help  

BBC short decks are short compared to other big blocks,a 4.25 stroke is the most I would put in.Piston pins and rings are already a issue with 6.385 rods and 4.250 stroke which is the longest rod possible and puts you back with a 454 rod to stroke ratio around a acceptable 1.52 or so.Internal balance is of course the best route,Probe has a 496 strokerkit with offset piston pins and 6.250 rods to stay out of the ring lands.The offset is to reduce the piston skirt side loading for less friction,haven't heard much on this kit to know if it really works.   WIEDER  

Wieder,

Do you know if the Gen VII 8.1L engine used the same 9.8" deck as the older big Chevys? I'm positive that engine used a 4.375" stroke and a 6.135" rod or something very close to it.