Will these wheels fit a 1979 GMC 1/2 ton?

[BoostedinNM]

Hey guys,

I have searched the forums here and have not got a definitive answer, so here I am. I am wanting to know if these wheels will fit my 1979 GMC 1/2 shortbed. Discs up front and drums in the rear.

https://www.ebay.com/itm/302912802394?ul_noapp=true

I asked the seller on flea bay and he said they would fit fine, but when I looked at all of the compatible vehicles on their list, they were all 2009 and newer Dodge, Jeep, Volkswagens with 5x5 bolt patterns. The center bore size seems to be plenty big enough at 83.1mm, but I don't know. The holes for the studs may be off in size, but again I am not certain.

All the research I have been able to find says that 5x5 wheels for GM / Chevy trucks are interchangeable from 1971 to 1998, that's it. So the fact that all of the vehicles are on their interchange list are 2000 and newer, it has me concerned. Guess I may just call American Racing in the morning and find out directly from them.

Thanks to any of you that can shed some light on this.

Brent