Paul Kane will probably see this and respond......he knows a lot about 429-460 engines. I can tell you from the numbers you have a 73 engine, which I think was the beginning of the low compression 429's, so a piston change will probably be in order. But like I said, Paul and some of the others too will know exactly what you need to do.

We had a '72 T Bird with a 429, and it made very good power.

Don