Hi Bill,
I am glad everything turned out ok for your close call!
Removing the stock proportioning valve will allow more pressure to be delivered to the front brakes. If your front brake are in order, they should theoretical lock up together. If one is always locking before the other then that should be looked into.
With the stock proportioning valve removed and no other changes it is possible the problem could be worse. There is a lot of differing opinions on this topic. My suggestion would be to upgrade the rears AND remove the stock proportioning valve. You would not believe the improvement. There are quite a few forum members that have done this upgrade and are VERY happy with the results.
http://pantera.saccrestorations.net/sak41172.html
Take care, Scott
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