Couple questions here. I would be curious to know what application the Hydro boost was originally for, and did the bolt pattern match up to the firewall or did you have to modify in order to make it fit?
They come from any diesel truck be it GM, ford, dodge and toyota.
V8 Mustangs used them as well. Cant remember what years.
Everyone seems to remember the GM Van's having them in the 90s.
Your brand new diesel trucks still have them.
I had to modify my mounting bracket to fit my dart because the bolt pattern is off a bit. I think every hydroboost unit will need that modification.