[DeTomaso] Vacuum booster

[JDeRyke at aol.com]

In a message dated 6/15/11 12:16:59 PM, rob at dumoulins.net writes:

> J, Can you be more specific?  Is the conversion written up somewhere? 
> 
Not that I remember, but installation only consisted of unbolting the 
stocker, bolting the Byars conversion in its place, and fabricating two new brake 
lines to fit the GM master cylinder. The Byars conversion involved them 
chopping the 4-stud GM mounts off the booster, welding three new metric studs 
in place to match the original Pantera mount, then gold-alodine coating. Uses 
stock nuts, washers and the stock pedal pushrod. It fit but was close on 
our early L where the inner wheelwell edge snuggles up to the brake booster 
cannister. On some cars with heavily upholstered front trunks, this is the 
only area where you might need a small dent. The aluminum GM master cylinder 
has a built-in 2 lb   pressure-hold valve to the front calipers, saving the 
cost of adding one.
The two fabricated lines take SAE flairs, not Euro bubble-flairs; they need 
to be fabricated because the two outlets are both on the inner fender side 
of the master cylinder, which does NOT protrude at an odd angle nor stick 
further into the front trunk space than stock. Finally, paired with certain 
clutch master cylinder adaptions, the slightly larger dia. brake booster gets 
very close, and a little file-fitting might be needed. My aluminum Girling 
clutch master fit unaltered as did a stock iron MS, but there are many such 
combinations possible. 
Incidently, it's been in our Pantera for 6 yrs; 2 yrs after I installed it, 
the plastic vacuum exhaust valve housing cracked for unknown reasons 
(protrudes into the cabin thru a big hole; I might have done it myself) and Byars 
overhauled it free of charge. GOOD service! FWIW- J DeRyke