I'm putting 2.02" valves in 360 heads ...

... and I need some guidance. I DON'T need arguments against doing it.

I found cheap seat cutting tools from India on eBay and will do the work myself (and post video - whether I fail or not ...). I got a custom kit with six cutter heads so I can do a 3-angle job on all valves, 30, 45 and 60 degrees.

My plan is to put a single plane intake and a big cam in it, aiming for high rpms on the strip. I already have stock heads and a dual plane intake for ordinary driving. This setup will be for fun only.

I'm shopping for guides, valves and seals and I find it so confusing.

The intake guides that are in the heads are stock, the machinist decided they didn't need to be replaced so I suppose they're close enough to the stock ID. The machine shop drilled out and reamed all eight exhaust guides, though. I will be pressing in new guides myself.

I have brand new exhaust valves (came with the heads) but I need to buy intake valves.

I will machine the valve spring seat for proper stem seals (and to work with the springs I decide on eventually).

Questions:
- What valve stem clearance should I have on intake and exhaust?
- Should I ream up the stock guides and get oversize intake stems nevertheless?
- Will ENGINETECH S2970 Viton rubber valve stem seal kit hold up on the exhaust valves, too?
- One, two or four groove keepers?
- Stainless? Why/why not?
- Other considerations when I choose valves?

Thanks in advance!