bbc heads

[cowboy]

the casting number off of my 454 bbc heads is 336781. i've been to mortec and found out a little bit of info on them but i was wondering what the compression is on a 78 454 and whatthe vavle size is in those heads that i have. thanks
cowboy

 

[tcodi]

I have a big block book that lists all casting numbers and gives any spec you'd want to know about the part. I'll look when I get home and let you know.