[smrat]

i see a lot of these chrome brake booster /cylinder on ebay for chevys, could i make one of these fit an S10? can i just take off the back bracket and bolt this to the firewall?

[dinger]

Moving to basics in hopes someone knows the answer. You may have to dig up some more info, as to what the boosters on ebay fit.

[oldguy829]

I suspect you haven't gotten an answer, cause it's not that simple.
Boosters have to be sized for the system. Not too complicated. If it has a 9" now, another 9 inch should work, etc. The master cylinder is another story.
If yours is disc/drum, the new one needs to be disc/drum, or you get into some technical problems. Likewise the size of the wheel cylinders. There is also the issue of residual/proportioning valves in the system etc. Best bet is to get one designed for your vehicle. As far as the bolt in... unless the center hole and bolt pattern are the same, you will need to modify the firewall mount.
I assume this is a replacement, not a switch from manual to power, etc. that brings in more issues.