Cast or Alum.heads for racing.

You could start out with Kate Jackson and fix her up ( lil' cosmetic surgery, enhance this, enhance that..) or just go straight to Farrah Fawcett ( the W-2 ! ) As far as ancilliary costs, you need an intake, some headers, valves, rocker arms regardless. Steve Dulcich put it this way: " Why use an “exotic” head like the W-2? Essentially, the W-2 and other similar aftermarket heads address and correct several bottlenecks to performance inherent in the small-block Mopar head architecture by offsetting the intake rockers to move the pushrods away from the center of the port for increased intake-port width. With the factory valvetrain, the intake port’s cross-sectional area is limited adjacent to the pushrods, while the W-2’s layout makes room for a wider port at the pushrod pinch. The W-2’s wider oval intake ports require a corresponding W-2 intake manifold. At the other end, the W-2 has raised exhaust ports and a spread bolt pattern at the header flange.

The bolt pattern change allows easy installation of large-tube headers, whereas the stock layout causes the header bolts to be crimped against the tubes—even with 1-5/8-inch street headers. Finally, the W-2 is available in a long-valve version, which increases the valvespring installed height from the factory1.65 inches to 2.00 inches, making room for the stouter springs needed to go with high-lift cams. W-2s come in a number of different chamber configurations. Our W-2 has the standard 70cc production-style open chamber. After the porting work, we had 75 cc’s for a compression ratio of 10.4:1. Milling the heads can bring the ratio near 12:1 with the same flattop pistons. "