jim, saw that after i read your post but the aluminum version says that the electric doesn't match up for a 75. called volunteer vette parts as howard suggested and they ran out of them too. guess this is the year for these valves to go.

i guess if all else fails, i might have to cut the floor pan out and be like fred flintstone

Try Inlinetube Brake and Fuel Line  800- 385-9452, tech 586-532-1338, www inlinetube.com....they manufacture, distribute, sell outright exact repo brake and fuel line parts, they show a Prop. Valve  74-77 corvette , $85. under Chevrolet , located in MI, click on Proportioning valve page, towards bottom of page, theirs stuff looks pertty good, good luck.  anips2009-06-12 19:27:19

haven't been on for a few. thanks joe for the tip. will call them monday morning and see if they have it. pulled the old one out finally and found out where it was leaking and why it is not working.there is a connection that the back brake line screws into. i unscrewed it from the valve and on the top of the connection it has what looks like a freeze plug. there is a small rubber diaphram under the cap. i know this because the cap was not there. will try that link joe suggested mon and hope i get it soon.

kind of rots as i have 2 corvettes and can't use either one

[QUOTE=eddie20875] kind of rots as i have 2 corvettes and can't use either one[/QUOTE]