Stage what?
Sorry, but those heads are not intended to be put on that block.
1. The intake/exh valve layout is different.
2. The block has no provisions for the added headbolts.
3. The flow on the head FAR out runs the size of the engine.
4. The valves are too large to clear the sides of the bore.
5. The engine w/ those heads will not fit into a stock engine bay.
[The heater/AC must be modified or removed.]
6. The intake will have to be either a aftermkt sheetmetal or a modified 4bbl intake.
You can get a cam that will work. Comp Cams.
The 4bbl intake can be made in a machine shop.
The headers can be bought from ATR.
What I think??
Do yourself a favor and buy a set of T/A heads when they come out, or a set of currently available Champions.
You don't mention what the goal
are but, if this is a SERIOUS race only project, it's just not practical. You will have to spend your kid's inheritance to get it to run and [maybe] stay together..
If it's a street project... FORGET it! Spend your money elsewhere!
I suggest you do ALOT of reading on the receipes on GNTTYPE.org and find a level you are comfortable with, and proceed from there.
Lastly, If you can, return the heads, and sit on the bucks til you have a decision made...
BTDT!!
Back under my rock....