MC B~1 Koffel Heads

[moparcrazy]

Hey everyone, it's been a long while since I've posted, wondering if you guys have any experience with the MC (moved center) B~1 head has the 2.40 intake valve, also besides the 2.40 vs 2.30 valve B~1 Originals is there any deference between the two Heads? TIA.

 

[66 Cornpicker]

The B-1 M/C head will require a different offset intake rocker, but that's about it. They can make real good power, my friend has gone 5.70's in the 1/8th in a 3400lb 69 Roadrunner only leaving at 3400rpms and shifting at 6600.So there's alot left in the combo, it's a low deck 521 single dom. 13-31 rear tire and it's a real 6-pac car, he's owned it for over 40 yrs. They are good heads for racing.

 

[65CopCar]

My 574 B1MC motor made 1060 hp on the BES dyno. BES did the work, and they hogged on the heads pretty good. Especially the push rod openings.

I like to mess with folks - put M/T valve covers on it. LOL!

 

[moparcrazy]

My 574 B1MC motor made 1060 hp on the BES dyno. BES did the work, and they hogged on the heads pretty good. Especially the push rod openings.

I like to mess with folks - put M/T valve covers on it. LOL!

View attachment 1523811

sounds like a great combo, what did the Heads flow,

 

[65CopCar]

sounds like a great combo, what did the Heads flow,

473/325 @ 1 inch lift

 

[not so famous bob]

473/325 @ 1 inch lift

daaayyyuuumm !

 

[oldkimmer]

Wow, that’s totally awesome. Kim