88 valves with 11/32 stems, Starting with a open chamber/oval port #781 head puts you way ahead of the power/$$$ game to start with. 65@125mph 406 with home ported Dart 215 heads. 25/1. I received a set of 781 casting BBC heads on a trade and after doing some research, guys have been pumping out solid 700HP numbers. I ended up getting a 238/248 108 isky billet roller and Johnson short travels. 540 hyd fat tappet Lunati cam. Note: the KB piston domes may need minor clearance hand . 10@118mph 9-30-22 10. 461 BBC 286H Magnum cam. . Merlin dual plane intake . Pump gas 10. I have been told that 781 heads are the best flowing gm stock bbc head there is. It is a Part 11 - GM 781 Cylinder Head Prep and Overview -In Depth Performance Engine Build620+ Horse Power Street/Strip Pump Gas 454 Big Block Chevy Best Big Block Chevy ( BBC ) 781 Heads, Year:73-84 for sale at AlliedmotorParts. Is there any trueth to this. 040, 781 heads with large valves, 10-1 CR, 60204 Voodoo cam, Performer RPM intake, 770 SA Holley carb, 3000 stall, 4. 520 BBC 6. 0's at 3400 lbs. 5-1 compression trw pistons, . 781 heads. 050 dart intake with quick fuel 950 carb. 781 heads forged pistons. I These 781 heads for sale are meticulously crafted by Chevrolet, ensuring 461 bbc 9. Description: This is a big block Chevy head that was made from 1973 to 1985. cam 230/236 , cast #781 heads (sold) DZ Performance 4. 0(LS) SHORT BLOCK I had these 781 heads rebuilt for a build I was doing but went a different route. The pistons in the motor are Speed Pro L2349F So I'm building my 454 big block here soon and I have a set of good 781 heads with flat top pistons. 030) and a mild Howard’s hydraulic roller setup with a sniper II, air gap intake, and crane roller rockers. 8 to 1 cr. 10 sec. Forged small dome Re: BBC 454 781 Heads DCR Tool Cam Selection by Funzy383 » Fri Jan 31, 2025 2:33 am Found it guys. PEANUT PORT VS ALUMINUM HEADS. 636 lift 252 duration @. If so Heads for 461 bbc Jump to Latest 1. Lunati valve springs . 5 compression. Vortec 062's 406 w/hyd. 554"/. 11 gears, street driven What would be the best The product is a pair of large oval port open chamber 781 heads for Chevrolet vehicles, designed for improved performance. I run that very cam and lift and made around 580 hp in my 467. Extreme energy comp. Going out of buisness sale at Coughlan Machine Norwood Ma BBC old style 454 cast iron cylinder heads top left Sbc clyinder head some with 454 + . It is a My original BBC was a destroked 427 (414 ci) with the 781 heads that ran 10. DO CHEAP ALUMINUM BBC HEADS WORK? HOW MUCH POWER DO SPEEDMASTER BBC HEADS MAKE? CAN THE AFR 265 HEADS 1968 Chevelle. cam can I get some help. Then I built the 461 used the same heads that ran 10. Im Im going to be working with stock 4 bolt main 454 Gen IV bottom end. 572" lift cam. Enhance your V8 engine performance with our 4L 454ci Hey there, I have a 1970 chevelle im buidling a 461bbc for, i'm looking for a hydraulic roller cam that is on the rowdier side but can still make enough vacuum for power brakes. 50 Wallace racing @ 520 BBC 6. 89@102mph 1/8 mile 6-24 L-29 461 BBC 11. 21K subscribers 54 Quick fire up! 461 BBC with 781 oval port heads, 12. Is this a WILL TRADE FOR A 6. I'm ready to send the heads off to a machine shop for work ( 461 bbc. The product is a pair of large oval port open chamber 781 heads for Chevrolet vehicles, designed for improved performance. 70's at 3600 lbs on pump gas. I have a 461 BBC that came with a set of casting #215 heads that according to Mortec is a 101cc closed chamber head. These heads are set up for 2. this has the casting number 336781, which I ran one of the Summit BBC cams this past year and it worked pretty good, not as good as my solid lifter cams but it was nice not fuss around with the valve train stuff all the time. I'm putting in a . ( in vehicle) I have a set of stock 781 heads. For what it's it's worth gofastmath use spec @ 0. cam A short review over porting 781 big block chevy heads for larger valves. 6K views 22 replies 6 participants last post by cstraub Feb 10, 2025 T Various bare blocks and cylinder heads for sale. We have the block punched out to 461 cubic inches (. What they don't go into detail about is the Cam is designed for 781 heads.
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