as far as supercharger or turbo on that motor, which ever your budget will allow turbo being a little more costly but much more ability for higher power applications.

if the motor is shot i would not pay much for the shell, i've watched "clean bodys" go for under a grand.

it sounds like your saying you can get the roller for under a grand. if thats the case and the power top works and everything is fairly clean sub a grand i'd be all over it and either put another s50/52 in it or just lsx swap iti (i have a spare ls2 in storage only reason why)