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6" rods are WAY overrated especially for street/strip motor. The factory spent millions on engineering the 5.7 rods in a small block. take the money you would have spent on long rods and put into...

Ok, now I'm confused. Didn't you say you wanted to make your 350 into a 383? If so you will need a 400 crank.

If you are asking whether stock 350 cast pistons and a cast crank will take 6K rpm....

Some of the early KB 383 pistons were the same part number as their 350 pistons using the shorter 400 5.45 rods.
the difference in stroke is the same as the difference in rod length.

I used a set...