depending on whats done to it me personally if im buying anything other than a build able core i would like to see paper work
find out what kind of internals are in it!
is he a friend you can trust?
low 12's may be hard to achieve all i see from jasper are mild sbc's it's gonna take more than 350 hp to run low 12's depending on your gears, weight, converter etc... my mild 350-375 hp camaro with 3500 stall and 4.88's will be lucky to hit high 12's
JMO
-logan