davebw31

These heads have been acid ported and cannot tell that was done (lost flow number spec. many years ago so do not have that). Chambers cc'd to 72 cc. 2.07" intakes and 1.685" exhaust valves. Spring pressure on the seat is 125# s and 320# s open. Guides cut for Teflon PC seals. Has rocker arm studs. Heads will need to be reconditioned (valves and seats only, and new PC seals). These heads are the replacement for "F" heads and are legal for NHRA and IHRA ! I set two (2) National Records with my E/SA BBO and passed NHRA tech with flying colors. $900.00 + actual shipping costs to your zip code via Fastenal. These heads are stamped on the valve cover side of the head "Racing Head Service".

davebw31

ttt

Bernhard

Do the valves and seats need to be replaced or reground/recut ?

davebw31

Bernhard: these were used in race car application only. My guess less than 100 runs as I quit running BBO and stayed exclusively with SBO class cars. Never on a street car engine. I doubt the valves or seats need to be replaced. Just a three (3) or five (5) angle Certi machine valve job plus new PC Teflon valve seals. Also, I know they do not have harden seats, intake or exhaust, as I used NHRA certified 100+ octane fuel.

I am selling out all stock, NOS , and race parts, so a price drop, now $700.00 plus actual shipping costs.

BTW: I bought these Ka heads from Ron Garey.

Bernhard

Dave when you bought the heads off Ron were they used by Ron before?
When did acid ported heads start appearing in stock?

davebw31

Bernhard: Yes, the heads were from one of his running BBO race engines. I bought several 70-72' race cars and all of his related race parts, engines, heads, rear ends, etc. in 1988. He had switched to mid 80's G body Olds SBO race cars.

I had the heads checked (mag), checked deck flatness, cc's, guides, spring height/pressure, and three (3) angle valve job. I ran these heads in a 70' E/SA in late 1988, then retired the car, pulled the engine/trans. I sold the body to a friend of mine plus some of the W30 parts in 1992.

I got my first set of #6 SBO W31 heads that were acid ported from RHS in 1974.

Drbigblock

Wow
Very cool....too bad as I'm doing a the stock 350 4bbl in my post
Coupe raylle 350 ....sold all of my B.B.O. Racing Stuff.....

Dave Siltman

Very cool stuff! Are you gonna be listing your other parts here when you sell them? I'd like to see the list of available items.

davebw31

Dave not much left as I sold a lot during the 90 s and early 2000 s. When I can get to it I will list in the parts section.