Project Forever Young

[K5_Knox]

New to the forum, so thank you for all of the useful information! I'll likely create a build thread for this. Yesterday I picked up a 1967 big window GMC swb (has a chevy grille) for a really good price. The only rust is in the floor board, which I'm now used to fixing, thanks the amount of surgery my 70 K5 needed. I plan on LS swapping the 305 that is in it now, converting it to 5 lug discs, and possibly air ride or at least coil-overs.

I'm seeking recommendations on the following:
LM7 vs LQ9 vs ???
Air ride kits
5 lug swap
anything else I'll need to learn along the way.

...and remember, I'm still wet behind the ears.

Thanks in advance,
Rick