On Mon, 09 Feb 2009 14:59:47 -0500, HK wrote:

It might use the same block as a street car.

Casady


It might have a block that measures the same as a street car's
block...that's about it

Sprint cars have long been using aluminum 410 ci small blocks. My car
was in the slower 360 class. I had one of the last iron blocks. A
stock block. Perhaps 600 HP on methanol. About one MPG. An attempt to
sell 90 pound magnesium blocks found few takers. You can have a 454 in
aluminum small block if you want it. Small blocks started at 260, and
were up to 283 by 1957 when we got the chevy wagon. Car had high
compression heads, solid lifters, and seat belts. Guy ordered it and
died. My old man never would have ordered the high performance stuff.

Casady