Cast head question?

I have a 460 out of a 71 lincoln mark 3. Rated at 365hp. It has the d0ve heads. I want to replace everything on the heads. Anyone know of any kits or is it best to piece it together?

Valves
Seats
Springs
Guides
Rocker arms

I would like to have stronger than stock!

You will need to piece it together.

If you don't want to find all the parts your self take them to a machine shop you trust and tell them what you want and they can get the parts and set them up for you.

Everything your looking at doing you may be better off getting some SCJ, Edelbrock or TFS Street heads. You'll probably be money ahead with the power you're wanting to make.

Anyone have a link to the stock head specs? Valve sizes, duration ect?

What do you want to know?

Valve sizes, spring duration ext

The stock parts are not good for the level of power you are looking to produce.

Factory Valve Sizes in those heads are 2.065 I 1.65 E

Forget about using factory type springs, they are not going to allow you the cam specs needed to reach your goal either.

For the power you're asking for, with the limited compression and displacement you'll need heads to flow in the mid 300's and that's a lot of work and expensive if you can't do the porting yourself. You will have more $$ in them than buying some aftermarket performance heads.