chevy iron head

[SSDiv6]

Originally Posted by firebird

in modified class -you can run any cast head as long as it has in my case a gm casting number.the 4446 vortec looks best for the class with a 10.5 weight per cube and a 366 cube limit and a 3300 car-.Can you all give your opinion and advice ------THANKS-- FIREBIRD

Yes, the Vortec 446 casting is legal in SS/CS class. Michael Mans has his SS/CS engine for sale on this site and it is a record holding engine.