360 downgrading more street

The cam is good for the 12's easy with 3.91's and a good converter.
Bowl Port the J heads.

Give me a call with the part # of the piston to determine if some of the dome can be machined off. A call to Arias is in order here. Other than reducing the compression somewhat-as already mentioned find someone to work the heads properly and you could end up with a nice strong 360 with far more than 380 hp. J.Rob