possable or need the 502 tall deck? im goint to have rods pistons a crank and pan when im done with my build so i figuered id put anothe one together.
-Mike

i dont think you can do it, but i may be wrong. my 427 tall decks were 60 over and stroked to 4.25, but that only made them 496. In order to put a 4.25 crank in that block you will need to take material out of the oil pan and block so that the rod bolts clear.

what bore was it?

540= 4.25 stroke and 4.5 bore

No way you can bore any 427 block to 4.5!

I don't know about a 540 out of a 427 tall deck but several years back I had a 427 tall deck that was taken up to a 525cid. It dynoed at 618hp @ 5500rpm and 633tq @ 4800rpm.

TX i didnt think you could open it up that much but though d ask ll just look for a tall deck 502 in need of help

you dont need a tall deck to make a 540 out of a 502. Regular short deck 502 block will work fine, and easier to find parts for.

Actually most 540's are made out of stndard short deck.

cant with the rods and pistons i have

May be cheaper to replace rods and pistons then find a tall deck block and all the other crap that goes with using a tall deck to just make a 540. That is unless you are already running a tall deck and have the stuff. The correct 6.385 rods and proper pistons are off the shlf items these days. If you are set on going tall deck maybe consider building a 572 instead.