MG Bryan wrote:
Why is the 360/727 better than a 401 and a 5 speed? I know very little about AMCs, and I am intrigued.
Ah, good question. In general, they are not, but in my case they are. The 360 and 727 in the Javelin are the original components (which is a plus for value), and are in operating condition (as in it starts and the trans has park). Further, the 360 has the original 6090 heads, which are the 2nd best ones AMC ever made. The 727 is the best auto, period.
As for my 401, it had a holed piston from a bodged intake swap from the PO and was just a shortblock. It was also a late 70's Jeep motor, so it had crappy pistons (like 8:1 compression, yuk!). It also needed a complete rebuild.
The T-5 swap was nothing special. AMC used the T-5 first, so it's actually fairly easy to find the components. My trans was also a well used Ford unit that would have lasted maybe two launches behind the 360...