[drivethruboy54]

you cant lay rubber even with a good power brake?

 

[mkourany]

I don't know if you've read my recent posts, but i have a 68 J code FB as well. I was also unable to lay much rubber, just a chirp and another when shifts into second.
Seriptiously i found i had a vacum leak secondary to bad heater valve membrane. The distriubutor is vacum advance as you know. After fixing the vacum leak, and re-tuning the engine, i could barley keep traction. Unfortunately, the new heater valve also quit working and i now once again have a vacum leak and no power. As a temporary fix my vacum line has electrical tape at the end, and my other rear end is once again smoking!!!

 

[Baseballman2188]

Do you just floor it? I barely get a chirp when I do that in mine, but its a stock 289. Try holding the break down when you get on the gas, that should spin those tires pretty good.

Travis

 

[mkourany]

Yea, i floor it. But in order to stop spining i have to let off the accelerator. I've got a 302 4v with aftermarket cam, and the J code heads from 68 are exceptional, (or so i've been told).

 

[sidewinder]

600 holley,AFR 165 heads, E 303 cam, and a edelbrock RPM intake. A set of shorty headers wouldn't hurt either.

If your looking for a cheaper way try recurving the distributor and a shift improving kit for the transmission.
The AOD and the lightning 2 second shifts may have alot to do with it.
I would still consider ditching those restrictive factory heads. This is why I'm a cleveland fan. My 1970 is close to stock and I can't hook up in 1st anywhere. Heck it even breaks them loose in 2nd without touching the clutch pedal.

 

[Roddster]

Get some tires from 1968 on it.