8 inch converter questions...

I'll just start out with the current specs:

74 Duster, unknown weight, probably 32-3400 race weight
full interior
subframe connectors
no heater

360 .060 over, 10:1
stock crank, rods, & Speed Pro hyper pistons
Milodon pan and windage tray
HV oil pump
OOTB Edelbrock heads
Edelbrock Perf RPM cam 7177, 234/244 int/exh @.050
1.6 Hughes roller rockers .520"/.544" int/exh
RPM Air Gap
Holley 750HP DP, 1/2" open spacer
Mopar Performance distributor, 18* initial, 35* total, all in by 2500
Taurus electric fan
1 5/8" cheapie headers to 2.5" exhaust dumping at the axle, Flowmaster 40s, and cutouts

9.5" PTC converter
rebuilt TF727 with TCI Street Fighter valve body
8.75 rear with 4.30 gears and Sure-Grip
Nitto NT555R drag radials, 275/60-15
small block torsion bars, 90/10 Lakewood front shocks
002/003 SS springs, snubber, CE adj 3-way shocks
Mallory 140 fuel pump, Mallory bypass regulator, 1/2" line to and from the tank

I am currently running 12.0-12.1 @ 110-ish with mid-to-low 1.6 60-foot times and am planning a cam change this spring. I'm currently leaning towards something [email protected] and .550-.600 lift. I have a ported Victor 340 that has been sitting on the shelf that might be a better fit than the Air Gap for the new cam.

While I'm at it, I'm considering pulling my 727 9.5" PTC converter that flashes to 4200 and going to a 8" converter that would be purchased after I finally buy a cam. I'm shooting for mid-11s with the new combo.

I have some questions, since this is unfamiliar territory...

The 727 is basically stock, other than a 5:1 lever, HD band strut, TCI Streetfighter VB (has the low band apply), and the converter. I haven't had any problems with it and it works well. Do I need to do any upgrades to safely run a 8" converter, like a bolt-in sprag, billet drum, trans blanket, or some kind of unobtainium widget I haven't heard of?

Has anyone run a 8 inch converter on the street? I'd like to be able to get out on the highway with it and be able to run between 3000 and 3500 RPM without problems. I have an external transmission cooler plumbed in after the cooler in the radiator.

I'd appreciate any input, since this may be a tall order. This is a street/strip car and I can tolerate quite a bit, but it needs to be able to get around on the highway without riding on a trailer.