I would use the crane conversion kit for a cam up to about .530 lift max. If you notice the bottom of the studs are only 5/16" while the tops are 7/16" on the conversion kit. If your racing the car pay the money buy the best valves around(1 piece severe duty)and have the heads done properly. It will save you a lot of head aches and money down the road.
The 5/6 to 7/16 kind of scares me. I am only using a .510 cam and it is a street toy but trying to get an idea of milling the heads to do it right while the heads are off. I hate to be sorry later if they dont hold up.
I think my local speed shop charges about $80 to do the milling.
I did mine myself with a cutter kit that Crane Cams sells. The kit cost more that the speed shop charges, but I have done several heads for myself and other people for a small fee. It has paid for it's self.
$80 sounds very cheap. With the canted valves, I would think it would be more expensive than doing say a small block. I guess it depends where you live. I leave near Detroit and everything is always top buck. I have not checked with the machine shop that is going to do some head work for me yet to see what they charge.
<font size=-1>[ This Message was edited by: Blue Fastback on 1/19/02 10:47pm ]</font>
Just a quick note about the crane kit, if you install it without taking the heads off, you wont be able to get the heads off without taking the kit off, the kit blocks some of the head bolts from coming out. If you replace the upper row of bolts with allen head capscrews, you won't have problems installing or removing the heads, I've had the capscrews in now for 4 months, havent had a problem yet.