If you got them cheap they are ok, less apt to crack, I have several sets myself, not all that rare, its just that most people now are using aluminum heads. As far as using them with a 471, if the motor is not built yet you`ll need to drop the compression down to about 7 to 1...for street use with pistons...
`37 Ford Coupe, 406/350/324 posi
`64 C10, 350/350/373 posi
`68 Dodge Dart 370/904/325 sure grip
`69 Camaro RS/SS 350/350/307
"The difference between stupidity and genius is genius has its limits"...Albert Einstein
“Life is not a journey to the grave with the intention of arriving safely in one pretty and well preserved piece, but to skid across the line broadside, thoroughly used up, worn out, leaking oil, shouting GERONIMO!”