Ansen Slots Backspacing

I've been doing some research, and I haven't really found any correct answers. I'm looking at finding some Ansen Slot rims. What I am looking at is some 15x10s for the rear and some skinny ones for the front. My first question is, what backspacing were available for the 15x10s, and how skinny did they make these rims for the font runners?

 

3.5 back space, 3.5 x 15 fronts from what I know

 

what dubcee said.... that is what my set of wheels are.

 

15x10s 4 3/4" bolt W/tires ... not ansen, probably appliance (Says JAPAN)
$250 for pair from norcal (on you) ... also have a 8 inch pair, same tires

I'll measure the back set if your interested.

 

15 x 10 Std Ansen backspace about 4" 15 X 4 sprint 1 was about 3" backspace. If you dont find an answer I can measure my 15 X 10 but the 15 X 4 are on the front of my 55 chev in winter storage. American racing only shows the 15 X 7 & 15 x 8 currently and my 1968 Ansen catalog only starts at the 15 X 6 and goes to 15 X 8 1/2. The 15 X 10 & 15 X 4 came later.
Former Ansen Employee 67-97

 

ops thats employee 67-69 no 67-97