mpaschall, here is my shopping list for my similar '68 I-6 A/T manual steering manual drum brake car. My girlfriend will be driving it and PS and PB are pretty much a must. Happy to have shoulder belts as well!
In order:
1. Borgeson PS kit with pump. I will do this in stages - first with the 6 cylinder in place and a longer PS hose, later with the V8 and a shorter PS hose, but the kit should just bolt in after collapsing the factory steering column 1-2".
2. CSRP disc brake kit, with the power conversion option. This will have to be done at the same time as the 9" rear conversion, as that will make the car 5-lug.
3. Engine I have already, a 302-based stroker.
4. Suspension - TCP kit up front that retains the regular spring and shock up front but allows for coilover conversion later and doesn't require Shelby/Arning Drop holes to be drilled - it has a drop bracket. Rear will be Flex-a-Lite springs and probably a Cal-Trac or something similar.
5. The most expensive part - Lentech or competing AOD. Yeah, I want an OD as I will be going with shorter rear gears. It's either that or a Gear Vendors overdrive, and a built C4 plus Gear Vendors costs more . . .
Not cheap, but I think there's a lot of value in the parts I have listed above . . . you could do this step by step, but the biggest chunk seems to me to be the front and rear brake/rear end/5-lug conversion part of it, whether or not you go with upgraded A-arms as I am doing.
Hope this helps!