recognize this carb spacer??

[68blk500c]

Does anyone recognize this carb spacer?  Plastic with 5/8 nipple.  Thickness 1/2 like 289.
Maybe after market part?

Thank you for your input.

[crossboss]

Yes, I do. They were used among many Ford engines in the 1970s. I had one such spacer on a 1972 Lincoln 460 engine. Fairly common...yet hard to find in good, not cracked condition.

[68blk500c]

Thanks for that information.  The underside has pilot holes to be drilled out to fit a smaller bolt pattern, which seems unusual.