big block heads

i have a set of heads no#12562932 will they bolt up to 454 and what size are the valves

 

Those heads are a gen.V set. 1991-1995 oval port, open chamber truck crate motor 118CC chambers. You will have to use the right head gasket for gen.IV blocks 1.88 ex 2.25 intake I believe not positive on valve size. Maybe 2.06 in. 1.72 ex.

 

probably a peanut port head also--worth scrap weight