[DeTomaso] next on the list

[John Buckman]

Seal kits are available (haven't checked on the pistons yet).  One of the problems with
the earlier seal kits was that the seals only had around .002" interference fit with the
cylinder bore.  The minimal interference fit coupled with honing the cylinder bore resulted
in very little (if any) interference, which would cause the master cyl to by-pass.  During 
normal braking, slight by-passing may have gone unnoticed, but certainly would have
revealed itself during hard braking.  Current seals appear to have a better fit.  The master 
cylinder bore is 7/8" (22.250 mm), and often is called out as a 22 mm. 

You will find pits in the cylinder bore, and sleeving is the only option if you choose to 
rebuild.  Sierra Specialty Automotive in Quincy, CA does both rebuilding and sleeving
of these Bonaldi master cylinders.  Sleeving is $110, a complete rebuild is $190 (including
sleeving).   

Sierra Specialty:   http://www.brakecylinder.com/index.htm

Kits are available from GT Car Parts in AZ,  623-780-2200.   Kit is # 95696967.

YMMV

John