https://www.youtube.com/results?search_query=bbc+peanut+port+headsTooth,
Using the 781’s on the first block, put 225/188 valves in, it’s the spec you and Don J came up with. It will have a 700R4 behind it
I have a set of 236 and a set of 360 for the second block. Going to build a torquer motor. I’m thinking the 236 are the better of the 2 because of the better exhaust opening.it will have a TH400 behind it
She sure is PURDY! Does she have a sister!Got the block back today! Armstrong’s does impeccable work. View attachment 93611View attachment 93612
1409236086-88oval OPEN454 Truck
33678173-85oval OPEN454, 118cc chamber, 256/114cc ports
34623675-87oval OPEN454, 120cc chamber, 225/116cc ports
33678173-85oval OPEN454, 118cc chamber, 256/114cc ports
Tim here is a comparison and I cannot find any numbers on the 360 heads either. The 781 is used on a lot of 496 motors. The intake runners are 31cc bigger than the 236. They also have a 113 combustion chamber. Since they are peanut ports they will automatically give you more low-end torque and more throttle response from idol. Not much good above 5000 RPM with any cam. If you’re going to put a small lumpish lump choppy idol The 236 will work fine. Not sure about the 360 due to the lack of numbers. I’m sure they’re fairly similar.
Clift notes of what I’m doing;Number one, GM did not use 781's on any 496's they build which were only built in the mid-2000's. As for the little peanut port heads 236's or 360's my 236's were in the high 11's and the 360 which I think are a far superior head to all the others, the car was in the 11.20@117mph and the 360's I did will pull 6500 any day of the week with only an 8:1 compression engine. Even after some chamber work my 360's cc'ed @116. People always snear at those little runner heads until they get beat by a set. Look up Vortecpro online, his little peanut pot BBC makes very close to 600hp and is streetable.
The 496 is a stroked ..060 454, I may have worded it wrong. A lot of people who build 496 motors use a 781 head. What I should’ve said was a lot of people use the 781 on a 496 stroker motor!Number one, GM did not use 781's on any 496's they build which were only built in the mid-2000's. As for the little peanut port heads 236's or 360's my 236's were in the high 11's and the 360 which I think are a far superior head to all the others, the car was in the 11.20@117mph and the 360's I did will pull 6500 any day of the week with only an 8:1 compression engine. Even after some chamber work my 360's cc'ed @116. People always snear at those little runner heads until they get beat by a set. Look up Vortecpro online, his little peanut pot BBC makes very close to 600hp and is streetable.
The 496 is a stroked ..060 454, I may have worded it wrong. A lot of people who build 496 motors use a 781 head. What I should’ve said was a lot of people use the 781 on a 496 stroker motor!