HOW ABOUT A 1979 318 V-8 IN MY '73 SCAMP?

allright, so now were committed

start with the engine mounts, because that is the hard to find part
there are only 2 options here (as far as i know)

first of is conversion mounts from shumacher
this is the easy way to go IF you can find them
however, it seems that company went belly up, and unless you get extremely lucky, you will not be able to find them

so, that only leaves option 2
a K frame from a A body that came with a V8

then decide on a 4 barrel intake and a nice 650 carb (i prefer the holley style, but not everyone does)

the cam will be dependent on rear gear and torque converter (i think a comp cams 268 is about the biggest you could run with a stock converter)
so figure out the whole package and go from there

the fact of the matter is, there are dozens of guys on here who have "go to recipes" for 318s that simply work
so do some research on here