Thanks Gear Heads, I have a 261 in my '55 Chebby P.U. thinking about putting this in a Sprint Car frame and making it street legal. What do you think? The block, crank, and head casting numbers all match with the clubs GMC casting numbers site military numbers. I wonder if I can open up the fuel pump boss for a cam driven fuel pump and no it is not going back togheter stock.--------------Thanks Dave
