hydro boost braking system?

[68 TT]

Originally Posted by v30crewcab

The astro van hydroboost is identical inside to a 80's 1-ton unit. only difference is the pushrod length. had many of them apart resealing them. it wasn't until 98ish they had bigger ones on some of the bigger trucks.

That is good to know. I guess the bigger one I pulled off a square body dually at the wrecking yard wasn't original to the truck then as it was clearly larger than the Astro van one I had already. I wish I still had it to get some numbers off of it now to figure out what it really came off of. Sadly I put it on a truck I sold last summer and I don't have access to it any longer.