I have a 700r4 behind my stock 350 it was running fine with my old motor I put in a rebuilt one same block number same flex plate only thing that changed is the intake and carb went from a Quadra jet to a demon street carb trans will not shift into any gear besides 1 neutral and revers

Is the TV cable connected and properly adjusted? Is a TV geometry kit required for the new carb?

If the TV set up is all good then pull the governor, good possibility that the gear is stripped.

RBob.

I have one more spot for the adjustment to try and I looked for a geometry kit and havent found one for the overner can’t it go out so fast every when the trans was working with the old motor