Holley Duel feed inlet Spacing...

[74 challenge]

Yesterday I was trying to put together my car in order to send it off to be tuned up so I can attend a father's day show with my old man.

I was attaching the holley 4160 fuel inlet to the carb and it's a giant flimsy POS that just twisted. I have a proform 650 carb # 67207. I am looking for a dual feed inlet that just has a slip on end for a fuel line and not an end that requires a screw in fitting. Does anyone know the spacing off hand? It seems the options are 8 7/8 or 9 1/4.

I am looking for a part like this: http://www.summitracing.com/int/parts/mrg-1551

but it says it's 8.88 inches.

Thanks!

[dodj]

8.88 would be for a 4160 style
9.25 for a 4150 style

[cudabob496]

there's adjustable dual feed lines