I can finally say that my 455 has C heads. I've been stuck with my piece of crap J heads for a few years now and they have been restricting the horse power on my 455 in the worst way! My father found some reasonably priced heads on craigslist and him being the awesome guy that he is contacted the guy and is having them shipped to the house. Can't wait to do some work on those puppies and put them on the ol' 455.

 

Keep in mind that there are small valve and big valve versions of the C. Big valves are found on 442, Toronado, and of all things some 2-barrel 455s as found in Delta 88s and there is generally no external way to tell which valves are in them.

Here's hoping you lucked up and got the big valve jobs to begin with. But any competent machine shop can put the big valves in for you.

 

Uh oh.......

 

I'm acutally getting them from a machine shop and he seaid they were the big valve heads. Hopefully I can get them in the best shape I can and get going. Any suggestions on what to do to them? Springs? Seats? Rockers? Also on kind of a fixed budget.

 

Do some bowl work just under the valve. Clean up the roof and tear drop the guides. Work the roof of the intake and exhaust ports. My advice is not to touch the floor of both intake and exhaust. A nice 3 angle valve job with a back cut on both intake and exhaust valves. Almost all the BB Olds heads I have touch, have been 80 or more CC's. If never been touch they have been 84 CC's. I would mill at least .025 off the heads to start with. More if you want to bring the CC's down.
Should make a difference.

Gene