Lt1 383 stroker kit and Chevy Blazer suspension lift kits?

Ive got two cars. my summer car, a 1996 trans am ws6 with the 350 lt1. i want to stroke it out to a 383. i cant find anywhere online to buy the new crank. everywhere i look there is always one thing that isnt right about the discription of the part. i also have my winter car, a 1996 chevy blazer 4x4 that i wanted to put a 2 in. suspension lift on and 31 in. tires. i need to find somewhere that i can buy the parts for my cars but i need to know its the right part. an lt4 block for the trans am would be good too. anywhere i can find the parts that will work for a semi-fair price would be cool. thanks