Carb adapter

I have a 750 cfm spread bore carb from an 87 Dodge pick up. I rebuilt this carb last year and used it on my Corvette while I reconditioned the original carb. This carb performed real well on my 350/300 sbc for the 2 months it was on the Vette. Has anyone used an adapter to use a spread bore on their square bore intake. I don't plan on replacing my original Carter but a $30 adapter would make it possible to use my spare if needed.
Thanks, Jerry