BB Heads - The 1947 - Present Chevrolet & GMC Truck Message Board Network

1-PU70 · 05-06-2002, 02:34 PM

I read that they didnt start making BB small oval port heads till 1975. Is this true? Does that mean my stock 72BB has large oval port heads?

SCOTI · 05-06-2002, 05:41 PM

If your refering to the 'peanut port' heads that sounds about right. Mid to late 70's is about when all the emissions crap was killing the breathing capabilities of most motors. I'm all for clean air . . .it just shouldn't matter whats under the hood as long as it's as clean as when it rolled off the showroom floor.

[This message has been edited by SCOTI (edited May 06, 2002).]

05-06-2002, 02:34 PM	#1
1-PU70 Registered User Join Date: Apr 2000 Location: Bradenton, FL Posts: 1,036	BB Heads I read that they didnt start making BB small oval port heads till 1975. Is this true? Does that mean my stock 72BB has large oval port heads? __________________ 1970 CST/10 402,700R4,3:73 posi,AC,PS,PB,TLT,PW,Buckets with heaters

05-06-2002, 05:41 PM	#2
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,064	If your refering to the 'peanut port' heads that sounds about right. Mid to late 70's is about when all the emissions crap was killing the breathing capabilities of most motors. I'm all for clean air . . .it just shouldn't matter whats under the hood as long as it's as clean as when it rolled off the showroom floor. [This message has been edited by SCOTI (edited May 06, 2002).] __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*



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