I find it easier to bolt the head down first. The cam tower bolts go into soft threads which are easily stripped out. Having the head immobile on the block allows you better finesse when tightening those bolts.

Torque is either 16 or 18 ft/lbs, I don't recall ATM. I set my torque wrench and carefully feel as lightly torqing and quit if any feel as if they are beginning to pull the threads. If any feel really soft, plan to put heli-coils in all 4 as unbolting and rebolting a tower usually will get the ones that held torque when the first one failed.

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90 300TE 4-M
Turbo 103, T3/T04E 50 trim
T04B cover .60 AR
Stage 3 turbine .63 AR
A2W I/C, 40 LB/HR
MS2E, 60-2 Direct Coil Control
3" Exh, AEM W/B O2
Underdrive Alt. and P/S Pulleys,
Vented Rear Discs, .034 Booster.
3.07 diffs 1st Gear Start

90 300CE 104.980
Milled & ported head, 10.3:1 compression
197° intake cam w/20° advancer
Tuned CIS ECU
4° ignition advance
PCS TCM2000, built 722.6
600W networked suction fan
Sportline sway bars
V8 rear subframe, Quaife ATB 3.06 diff