Bbc 781 Heads

I don t think larry could have done any better unless he ported the heads for free. I have seen the 781 s crack but only in severe applications. Car truck cylinder heads parts apply category filter car truck camshafts lifters parts apply category filter 781 heads 396 427 454 468 496 502 bbc gm big block chevy heads 336781 625hp 7.

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1968 Big Block Chevy Bbc 396 427 Oval Port Heads 3917215 215 C 12 8 C 18 8 Ebay

Gm Big Block Chevy Bbc 396 454 781 Factory Large Oval Port Heads 336781 Ebay

Cabezales De 781 396 427 454 468 496 502 Cabezas De Bbc Gm Big Block Chevy 336781 625hp 2 Ebay

Bbc Cylinder Heads Oval Port Chevy 396 427 The H A M B

781 Bbc Heads Complete Chevelles Com

Bbc 454 781 Heads Sold Over 100 Sets Hi Perf 396 427 502 336781 781 299 00 Picclick

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Bbc 781 heads.

15 years ago ibuilt a few of those engines and they ran good. Custom solid roller cam 10 2 1 compression dynoed on 91 octane bp gas. I m running r44ts in my 469 bbc it has higher compression 9 5 an aftermarket mild cam along with bolt ons the r44ts run dark stay damp in around the base of the threads i know my carb is a bit on the rich side but i tried a set of r44tss they stay cleaner but i m still not sure if i like them i v always run ngks if at all possible the v powers are easy to read. 496 bbc with cpm ported 781 iron port heads and intake.

2 of them i ran a solid flat tappet elgin cam 258 268 at 050 with 595 621 lift with a good intake and an 850 and 1 7 8 headers they whould run 11 40 to 11 60s on pump gas with a full chevelle and 4 10 gears and a. I used stock lower ends with 11 to 1 closed chamber pistons and stock 781 heads with just a valve job and good springs. The 781 s have the most unshrouded chambers of all the oem bbc heads ever offered this makes installing 2 250 or 2 300 very hp tq beneficial. I have a set of bare 781 castings that were given to me my plans are to have the machine shop open the throats up to accept 2 250 in and 1 880 ex valves then i will bring them home and do some bowl and runner work nothing fancy.