From what I understand you can make it work. You would have to
put your turn signals somewhere else, use 70 or 71 fender
extensions and possibly change radiator core supports...maybe
more, not sure
I know it can be done. The guy that built mine has built them for
guys that race the snot out of them and drive them home. I know of
5 that range from low 10's to high 11's. 4 are bb.
What are the plans for the planetary?
Did the car sit for a while?
You can try cycling between reverse & drive with the engine running.
drive for 15 seconds, reverse for 15 seconds...give it a couple of
minutes, it may unstick/clear