I assume your talking about stroking a 351 Windsor. The most common kit's out there are 393, 408, & 418. Tone's of manufacture's make cranks, rod's, piston's etc. etc. to make stroking a Windsor possible. Scat, Eagle, Probe, Lunati, FRPP, SRP etc. etc. are just a few of them. They make kit's or you can make a custom set up of your choice.
more info oin the 351 w. i dont plan to to stroke it, i might, but i can't find anyone who makes a crank or rotating assembly kit (forged) for a 351w. i check summit jegs for eagle and scat but nothing. know any specific websites/companies that deal with that? thanks