Sorry for not being more attentive. I'm still busting arse like a madman preparing for VIR.
For roll bars, the best bet any one can have is the Hard Dog Hard Core, available in either single or double diagonal, powder coated chrome moly or polished Stainless Steel. This model is the tallest of the Hard Dogs. The only compromise you make is the inability to use the side latches for the hard top. I doesn't matter, the top will still be perfectly secure. I really don't know anything about the bars for the M2 cars.
For harness, I use G-Force 6 pt camlocks. I used snap clips on eyebolts installed in the stock location for the belt. On the tranny tunnel of my '95 there was a bung covering a factory backup plate opposite of the belt location. Again I used an eyebolt and snap clips. The eyebolts are grade 8 7/16-20 thread. They are not easily resourced. I got mine from Pegasus racing supplies.
Lap and 6 pt belts share the same eyes. The 6 pt belt comes over either side of the seat and you sit on top of it. Some people like to secure the 6 pt belt behind the seat and route it between the seat back/bottom and then sit on it. This option requires drilling, extra hardware and backup plates. I employ all stock mounts/backup plates. Shoulder harness wrap around the welded in harness bar that is a component of the M1 Hard Core.
On the '95, the seat latch bolts to the side of the seat with some kind of slide mechanism bolting to the seat/latch point and further back anchored to the tranny tunnel. What function it really serves, I have yet to figure out. This prevented a clean belt install. I removed the slide mechanism from the car/seat. I fabbed a long pivot bracket that I bolted to the rear tranny tunnel location of the removed seat belt slider. I made the mounting hole sized so that I could use a stock seatbelt bolt with a short shoulder for the bracket to pivot on. When the stock seat belts are not used, the bracket stands up behind the seat. Clip the seat belt to it and everythings out of the way for harness use. This is extra good for the driver's seat belt circuit to be closed.
I'm a little under 5' 10" and still had difficulties making 1" clearance under tbe broomstick line. I obtained a couple of old seats and cut a wedge out of the bottom of each seat to provide some additional clearance. I think the seats feel better than the stock too. They cup your tushie.
I'll post a link to some pics as I am able to.
Regards,