["G"]

Cal, thanks for the reply...was aware of David's aluminum Toploader but was looking more for a comparison of the "traditional" original Cobra setup as it relates to a 385 big block with aluminum heads/manifold plus a Tremac TKOx. Do you know what a standard Toploader weighs?

Thanks

ps btw, an 80 pound toploader with a Keith Craft aluminum block FE engine would be an interesting combination in a CSX/Kirkham/ERA car for sure.