[westie 666]

Last year I got a 406 that was built a few years ago and dropped it in my 77, it has Holley intake with Holley 750 dumping gas into it, I don't know what went into this motor but was told it was all good gear.
Now I have a big problem with it running on and pre ignition, was told it is also running backwards, to combat this I shut down with truck in gear, put it on the dyno to try and fix it but no joy.

Any ideas??

Cheers
westie