I've never messed with Holleys, so I can't help you much there. I do know that with those 3.08 gears you're launch is going to suck, but top speed will be great. Part of your bog could be that, but as far as stalling I think there is something else wrong also.

What type of ignition setup are you running? Also, what is your plug gap set to? How long has it been since the last rebuild, etc.? Did you have these problems before putting on the Offy manifold? I'm just trying to get as much info as possible. Hope this helps. John.


'68 C-10 - 250 with Edelbrock 600cfm 4 barrel, Offy intake, Hedman headers and true duals, HEI, MSD 6A box, relocated gas tank
Soon to have: T-5 tranny