brewersperformance?

Was planning on putting a 1999 5.2 with a 46re into my 74 Duster. But was given in church this morning an A833 from an A body that was used in an auto shop class. It has been rebuilt ever year and never installed for the last several years. Missing side plate, bell housing and sifter. Anyway looking at this company brewersperformance. Have any of you used them and what do you think of them?