I'm at the limits of the stock 440 block now and would like to spray a lot more than the 200 shot that we are using now and at the same time make a little more HP n/a.

At the same time I will be upgrading heads as well to support the larger cubic inches.

What are the pros and cons of aluminum vs. iron on the street other than the obvious weight differential?

'63 Dodge 330
11.19 @ 121 mph
Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs.
10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.