New member, suspension??

[7duck]

Hi Boys,
I am a 67-72 chevytrucks.com virgin, I own a shop in Toronto, Canada, just picked up a '72 GM P/U & I have some suspension questions. I will bagging this truck & I will also be running 22"'s up front & 24"s in the rear, OD of the tires will be 29.8" front & 33" rear. Now, in order to park slam it & have it resting flat will the porterbuilt dropmember + air ride technologies + 3" drop spindle enable me to accomplish that?, now in the rear, I like the bolt on air ride technologies kit, but it doesn't look like the c-notch is enough, does anyone have that kit & does it lay flat? also, is there any mint cabs out there, close to Buffalo, NY?

Let me know,
Thank you
7duck