I have two IMCO Part # 02-6187 Bolt On Shift , ECM, EFI Module Brackets that were not used last season when i installed my IMCO Exhaust. I can e-mail pictures if anyone is interested. $20.00 + shipping.

Do you know if the bolt pattern will fit stock 496ho manifolds?

i do not know to be safe i would call IMCO, i also realized that one of the angle shaped brackets was missing and i realized it has been used on my boat so its really one complete bracket and the larger piece that mounts to the riser. i can send a picture of what i have if it would help.