Head disassembled: what valve springs to use?

[jrw21]

Hello all. I am slowly building/gathering parts for a stroker turbo m42 for my e30 318is. I hear there is a lot of great information on this forum so I joined. Actually, I talked with a guy from metric mechanic and he raved on and on about john smith on this forum.

Anyway, I am trying to get some Ideas on what valve springs to use with my setup. I am debating on the Metric Mechanic Behives, VAC Motorsports, or.. I hear m5 s38 springs fit and work great too. Not sure on the lifters yet either. My goal would be a reliable 7200-7500rpm head. More would be fine too of course.

I have the head torn down right now getting ready to drop it off at the machine shop. If it checks out ok I am going to get it cleaned, milled, and ported/polished.

The components I have on the bench are:
e36 m42 Head
e30 318is m42 Block bored out to 86.4mm
brand new s52 pistons/rings (need to be shaved still)
e30 m42 rods
m44 crank

Garrett t3 .63/.63
Tial wastegate