Well, I just realized that I never updated this thread because I have another one going on a different site.
I ended up going with a 523 with 10.3:1 C/R and a decent flat tappet cam.
Long story short, the 1st time I got it in the sand last season, I puked the tranny. I really didn't think it would hold up very long with the new power plant. That took a couple months to get fixed up and I got it back in the sand the end of Sept.
After cruising around for a couple hours and climbing a few hills,I started smelling coolant. Crap! back to the trailer. We got it home and found a bad head gasket. I thought it would be wise to pull a few lifters and just make sure that things were still OK. I'm glad we did! 1 bad lifter and some serious wear on the cam. Comp was nice enough to credit me for the cam, lifters, and nitrating so it was time to step it up again.
Now it's full roller with approximately .700 lift with the new rockers. A ported victor tops it off with a 1000 cfm Pro Systems 4150. I have a 1050 Dommy to send into Pro Systems mid season for the next upgrade.
Tranny has also been seriously beefed up with the regular recipe for holding 700+hp.
Currently the only item I'm waiting on before throwing the tins on is a girdle set for the heads- and I hope to have that by the next weekend.
Since this is a show piece as well as a runner, I decided to forgo the Ford blue with International red to match the trim and suspension. That way it will also match all of the MSD components too.
The lighting was a little weird with the light coming in through the window, so it does look orange in the pics. Trust me- it's bright red.
So with any luck, we'll be dropping it back in next weekend and firing it up the following. I still have to finish up the new instrument cluster so that I have accurate gauges before the break-in, but that's almost done as well.