Im looking for the best place to buy an new 383 stroker for my 1991 Sierra my 350 is getting real tired. I ve seen a lot on ebay but you never know about the quality of stuff on there. But i want a direct bolt in i beleive that would be 88 and up blocks if im not mistaken.

 

You could build one. Also check jegs.

 

check out CNC Motorsports (google it) the have very good quality stuff or try Bad *** Engines