91 T-Bird, rf brake lock/sieze up

It sounds like a engine ignition misfire to me, have the plugs and plug wires been replaced? If not replace them taking care to route the plug wires exactly as the factory did, replace any broken loom holders for the plug wires, this is very important.

ok theres no bleeding coolant but bleeding the brake lines and replace coolant to full mark and run car so the thermostat gets hot and opens and then will need to add more water or coolant

More often then not, the calipers don't sieze up, the rubber brake hose locks pressure inside the caliper. Try pushing the caliper piston back in, then do the same with the bleeder open. If they go in hard with the bleeder closed, and easy with the bleeder open, replace the corresponding brake hose.

This is bizarre... I'm suspecting dirt in line(s). Are you bleeding correctly? Starting w/ Right rear, left rear, right front, then left front. You might try using a power bleeder also. A possible long shot, is brake proportioning valve sticking.

remove the tire, then caliper which is held on by two bolts, then remove the brake line. After installing the new one it is required to bleed the brakes

The piston is binding in the wheel brake cylinder, perhaps a bit of rust in the cylinder.
Inspect it, replace wheel brake piston and maybe the cylinder if you can't make it "smooth".

sound like a bad sensor or loose wires whick would be behind the calipers

Those bolts should be allen head bolts and NOT torx (star shaped). With a torx bit in that hole all u will do is mess up a torx bit and the flats for the allen wrenches to grab onto. Try using a 10 or 12 mm( cant remeber which it is) allen head wrench.

Chanses are its the calipers that are bad, and the break hoses going from the hard line to the caliper are too, (one or the other) i've had both problems on my wifes durango, changed both calipers twice and last time replaced both break hoses, i have also done the same thing to a friends sebring with the same problem, seams to have cured the breaking problems on both. Best thing to do is replace both calipers and both break hoses, i think it will solve your break issue.

check your fluids and bleed the brake system , if that is all the issues your having . if low on fluid and keeps draining out then you have whats known as a caliper seal broken and that means $30-50 bucks for a new one/rebuilt , i know i drove mine like that for a bit and had to replace the driver side.