New Memeber and.. Will 5 x 4.5 15" w/ 3.5" backspace wheels fit on stok a108

Hello all! I just picked up a 1969 A108 Sportsman and have my first of probably hundreds of questions... I'm looking at a set of wheels and was wondering if anyone knows if a 3.5" backspace will work on a 108 without issue? I'm pretty sure the lug spacing of 5x4.5 is correct and I know my van currently has 15" wheels so I can't see anything other the the backspace that could be a problem. Any advice? Am I wrong about the lug pattern?

I'll post pictures of my van soon enough. Its kinda beat and ugly right now but mechanically it's really fantastic and I can't wait to dig into this thing.

Thanks in advance and I look forward to getting to know some of you and annoying you with stupid questions. I have a long background in vintage European cars and motorcycles but this will be the first loaf of bread I have ever worked on. Can't wait!

Thanks,
Jack

Yes the 3.5" back spacing will fit. Lug pattern is 4.5x5, lug nuts are 1/2x20 but the left side uses left hand threads, ass backwards from the right side. Also the center wheel register of the our Dodge's is larger than other makes so depending on the wheels you get make sure they have a large enough opening.

Thank you Busman, the left side reverse thread thing would likely have had me scratching my head for a good minute and now I'm trying to remember if my '69 dart was the same way... Anyway, thanks for all the valuable info. The set I'm looking at are nothing special, US wheels Indy's, but I like the look of them on a van.