New here - Intro & Question

[Pharaoh]

New to the forum and new to 67-72 Chevy/GMC. Been a chevy man all my life. Owned many, many dimes over the years. Up until now, I never had the time & funds to jump in to an older project.

Picked up a 69 GMC a couple months ago. Sorry for the crappy pics. So far I've been working on sorting everything out and planning timelines for the work to be done. This will be a weekend driver, so I'm setting plans to keep this available for the occasional cruise around town.

Truck is lowered, but it appears to be chopped springs all around. So I've ordered all the components for a 4/6 drop (2.5" spindles & 2 springs for the front) and 6" springs for the rear. Also went ahead and picked up disc brake setups for the front and back.

I plan on keeping the 6 lugs, so I've currently been searching for wheels. That has run me into all kinds of questions on backspacing.

I'd love to put a set of 20x9.5 all around, but from hat I gather, the backspacing may not work for the front. Link below, Legend 6 142 are 20x9.5 with BS of 5.75. I'm not sure how this will fit on the front. Thoughts?