Two 360 builds idea for heads

I guess I was asking about the heads. If I should go aluminum or cast. Only cause I can get my hands on a new set of cast 2.02’s MP5249574 or I can wait till the sale for speedmaster and go aluminum. Or say the hell with it save my money and redo what I already have 308’s or 915’s. I’m conflicted. I have parts everywhere in the garage.EFDA967D-0DEA-4957-B495-2148155BAE14.jpeg D171C7F4-EBAB-4875-B72A-CBC09E13C052.jpeg