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#1 |
Registered User
Join Date: Dec 2010
Location: Pittsburgh, PA
Posts: 1,009
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366 TDBBC "High Perf" Heads?
When I had intentions of building a 366 for my truck (hey, it was free), I noticed that the factory heads had a high performance stamp on them. Isn't this kind of odd? Or is it due to the rigidity of the valve springs, rocker arm studs, etc? Beats me. This was out of an 88 C60, it was carbureted from the factory. I don't have the engine anymore, but I was just curious about this. Thanks.
Steve
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Steve Member of the Foot Pedal Club '83 Chevy K20: 6" Rough Country, 3" Performance Accessories BL, Bushwacker Cutouts, 38x15.50 Mickey Thompson Baja Claws, 350 HP 350 crate engine from Jegs, Turbo 400 ![]() |
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#2 |
Registered User
![]() Join Date: Oct 2009
Location: SoCal
Posts: 815
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Re: 366 TDBBC "High Perf" Heads?
366 is a tall deck big block. As far as I know, all big blocks have Hi Perf stamped on the back of them. I dont recall ever seeing Hi Perf stamped on heads except Rectangle Port heads. Peanut Port, Oval Port & Rect Port are the only heads made for BBCs. I know a 366 didnt have them based on the RPM range. 366s had a long stroke for torque not HP.
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#3 |
Registered User
Join Date: Dec 2010
Location: Pittsburgh, PA
Posts: 1,009
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Re: 366 TDBBC "High Perf" Heads?
http://www.chevelles.com/forums/arch.../t-179986.html
Here is some info on Big Blocks for everyone. Not all big blocks were stamped "High Perf," but everything other than the medium/heavy duty truck blocks were. That is what makes mine so different, the number inside the heads matches up with the C60 it came from, and they were definitely the original heads, yet they had the high performance stamp.
__________________
Steve Member of the Foot Pedal Club '83 Chevy K20: 6" Rough Country, 3" Performance Accessories BL, Bushwacker Cutouts, 38x15.50 Mickey Thompson Baja Claws, 350 HP 350 crate engine from Jegs, Turbo 400 ![]() |
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