And which brake Master Cylinder are you using?

Also do you have the dual rear wheel cylinders or singles?

I use the stock 72 style mc on my 66 did not have a promblem,had to replaced this year rear seal went out but all is good.I have used buick regal,chevy truck,they all seem to work well.

I am using the d44/lc3rd. But all the brakes and outers are D44 so I guess its the same. I also have the TSM rear disk. I use the stock 72 MC and it works great! I also didnt pull out the little valves or whatever they are on the MC. I have more then enough brakes.

Got a friend running a weak44 frontend. He has 4-wheel disc brakes & is running a 70's Corvette master on a Cadillac booster. Stops great.

d44/d70 no idea what it will stop like. hoping the lil toyota supra can do it, but i highly doubt it! jiMMy