Tbone, way to say alot and convey no info.....

What Tbone wanted to say was....

Crankshaft is different, as is bore. While the crank being different might
be obvious, the reasons they concern you are that the crank has a different
main bearing size. It also is externally balanced, which will mean you need
to look at getting a torque convertor that is properly balanced for the 360
engine. Tbone is also correct that the PCM/ECM will need to be changed to
allow for the extra displacement. Check to be sure that the radiator is big
enough for the 360, and get a trans cooler as well.

In making the engine a bit more brutish, you'll want to consult people who
have done this before, and do it as a "package". That is, know what your
budget is, and what power you wish to get, and buy a cam, rockers, etc that
will work with the engine management. In addition, find out what exhaust you
can use without vioating any emissions/inspection laws in your state. If you
do it on a piece by piece basis, your results will vary, and will likely not
be as good as a well designed package of improvements.

A cam in the .050" duration of about 210 will be pushing the stock PCM, but
should work. You'll want to explore a slightly larger (more lbs per hour)
set of injectors, possibly a larger throttle body. My recommendation is to
have the stock 360 heads ported as a budget performance mod which will
return far more per dollar invested than almost any other you will do.
Compression ratio will go up a bit with a .030" overbore, so keeping the
stock 360 heads will be a good idea to keep a very streetable truck under
you. There are other options for heads, a set of "R/T" heads will be better
than stock, but will also cost a bit to obtain.

In short, concentrate on air flow through the engine, and power will follow.
No real need for a huge cam, but a slightly larger than stock will yield
some benefits IF you port the heads and have an aftermarket exhaust.

Just about all of the parts mentioned will interchange between the two
engines.