74 javelin engine

I have a 74 javelin bodys about done but need help with engine and drivetrain car runs ok 130,000 miles has a 360 should it be rebuilt or is there a new engine I could use I was seeing a crate 360 magnum will this fit and if so what about the trans and rear end not very sure on these motors any help would be helpful

The 360 Magnum engine is a Chrysler "LA" block (originally designed in the mid-1960's). It is completely different from your AMC engine and will not fit your car, unless you make extensive custom engine mounts wiring driveshaft etc and use a Chrysler trans.

Your 360 is an AMC block originally designed by Nash in the mid-50's. (Nash and Hudson joined to form AMC in 1954).

IMHO rebuild your 360, or look for an AMC 390 or 401 which will bolt right in.

Rebuild it. Put in some higher-compression pistons, a good cam, and a 4-barrel and intake and have some fun whuppin' up on about anything around, that's a strong motor once the compression is up and it's fed properly :)