3946074 AFR Heads

[OneStopRestoration]

Hi everyone, I thought this was a pretty unique set of heads that I had originally ear marked for a stock restoration and after further getting into decided there most likey of much more value to someone else.

To start with these are more modern cast 074 GM aluminum heads. They have had racing use in the past and have fixes on one rocker stud in each head. The inside of several combustion chambers have also been welded, dressed, and pre machine for final surfacing.

The unique and from what I can tell rare thing is these are heads that were worked by Air Flow Research. Im told in AFRs early days they modified existing heads. The heads are stamped “Air Flow Research” in cursive writing. The porting on the heads is nothing short of impressive. The heads also have the less often seen D ports with an air fin on the exhaust port outlets.

Heads are basically ready for the machine shop. $2500

[big gear head]

Those exhaust ports have been welded and reshaped. The 077 heads had the D ports, 074 had round ports. Looks like they have had a lot of work.

[Jimlt4383]

Originally Posted by big gear head

Those exhaust ports have been welded and reshaped. The 077 heads had the D ports, 074 had round ports. Looks like they have had a lot of work.

That is not correct. The very late 074 heads had the d port exhaust port and vain like the 077 heads. I have had several sets. Here is a link with a nos set I sold on here. https://www.yenko.net/forum/showthread.php?t=169700

[big gear head]

Wow, learn something new. Thanks.