I'm beginning a rebuild on an 89 350 L98 roller motor.
For the 1st part of my rebuild, I want to modify the heads. My objective is to get mid-high 12s in qtr, or very low 8s in 8th before nitrous.
With the above stated goals, what should I do with these heads?

I was thinking:
1) screw in studs
2) basic porting using deluxe standard abrasive porting kit
3) keep 1.94/1.5 valves
4) valve job (David Vizard recommends some kind of 30 degree stuff)

Do I need 2.02/1.6 valves?
New guides (thick bronze)? I haven't checked guide clearance yet. Still buying necessary tools.
Should I go ahead and install new springs before building my short block and deciding on cam? I plan to run these heads on stock motor with stock cam for a while (few thousand miles). I will use Comp Cams Pro Magnum Roller Rockers Self Aligning, also for a little extra on the lift.
Do I need to mill these heads? Angle mill possible?
What compression ratio should I shhot for? Thinking 10:1

My plans for other aspects of motor:
1 3/4" headers
Accel LTRs with some porting
ported plenum
either an Accel base I have or a ported stock base
I don't want to rev much past 5500, with a possible red line at 6000 or so
Forged flat top pistons, new rods
Cam yet to consider.
Street and raced often
3.27 or 3.45 gears



Thanks for any responses or recommendations.