I was looking around the other day, and i found a thread and could of swore it was on pirate4x4 of a solid axle swap on a Taco but i can't find it again. He had found a proportioning valve just like the manual summit racing one only it already had metric thread and would fit directly up to the Toyota's brake lines. Any help would be great, and if it can't be located, i'll just have to use the adapters. Thanks in advance.

 

Most likely you saw this one:
http://frontrangeoffroadfab.com/nfos...products_id=57

 

no, its looked exactly like the summit racing one, only it had metric threads instead of the NP threads.