302 or 350 smallblock in 84 b2000.

Ok so im hoping to start my project this summer. Im going to turn my 84 mazda b2000 into a drag truck. Im not sure wether to go to a 302, or 350 small block. I dont know what will be easier. im willing to spend a little extra $ if a 350 will work out, but im also not sure if it would twist my frame, and also how much more suspension work il need to do. Advice would be awesome!