Brandon Miller did the swap into an 83, heres the write up, I think this is the most recent one??
http://www.rivercityrockcrawlers.com/TechReports/MoPower/mo.htm
click on the 302 swap link from that page - after seeing this post I just updated it
I still like my NOWR motor mounts, MUCH better than the AA ones..
Do you use overdrive now? If not then you don't need it. A 4500 would be nice but I have a 435 and it is fine with 37's but then again I run 4.10's
