I'm looking for a vehicle to put a 4.3L vortec engine from a 2002 Chevy LS 4 door RWD blazer in.

S-10

any specific year?

Astro van, 1500 series Gm & chevy pick-up trucks, rail dune buggy, Jeep wrangler & CJ's, in-board boats, older Toyota pick-up 4x4, Also: http://www.rocky-road.com/samurai-4-3.html has a full kit the Suzuki Samurai,

http://cowan1984.xtreemhost.com/whythe43.htm?i=1 the pontiac fiero too

older model 80's -early 90's Toyota 4 runner

Only the gm chevy 1500 or astro's or s10 or s15 or the s10 blazer or gm jimmy's that came with the 4.3l will be bolt and play all others need a kit.