few questions about 302 5.0 installation

[csunracer]

Ok everybody, as mentioned in a previous post of mine, i'm going to be installing a 5.0 302 block out of a 91 mustang into my 68 Coupe. My questions are related to miscellaneous parts I might need. So far I have the HO block, ported gt-40 P heads, ported edelbrock performer RPM manifold, motorsport f303 cam, and a holly 650 carb, and a water pump off of the 91. Aside from these part's im wondering if my original 302 parts from my 68 will still work on this application, specifically the harmonic balancer and motor mounts. Other than that I'm going to pick up a set of roller lifters out of a late model 5.0,some arp head bolts, and most likely some 1.6 roller rocker arms.I also plan on buying a set of mac long tube headers and re-doing the entire exhaust with 2 chambered flowmasters and turn downs. Does anybody have any suggestions or ideas before I put this beast together? Any help would be greatly appreciated. And if anybody has any spare parts for sale that I could possibly use please contact me (