Click on image for the lowdown. 
====
| | |
2 members (Steveoreno, TPR57C),
106
guests, and
4
robots. | | Key: Admin,
Global Mod,
Mod | | | Forums66 Topics128,186 Posts1,057,320 Members48,469 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
| | THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Jul 2005 Posts: 52 'Bolter | | 'Bolter Joined: Jul 2005 Posts: 52 | Hi guys
I've got a 1951 3/4 pickup.
I want to do power brakes.
I have a T-5 with floor shift...so I need the clutch.
Is a hanging pedal or under the floor booster better/easier????
Most under the floor boosters are made to work only with auto transmissions. I've looked at the bracket (under floor) & I think I can make it work with some modification.
I don't care about originality or looks. A booster on the firewall is also ok. Should I be afraid of any difficulties with a firewall mount? The firewall mount is much easier maintenance.
Just want opinions as to what's easier.
Thanking you in advance....Carl
| | | | | Joined: Jun 2011 Posts: 5,096 Crusing in the Passing Lane | | Crusing in the Passing Lane Joined: Jun 2011 Posts: 5,096 | If one uses a firewall mount, don't forget to brace the firewall.
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
| | | | | Joined: Jun 2012 Posts: 1,749 'Bolter | | 'Bolter Joined: Jun 2012 Posts: 1,749 | Firewall on these trucks will not hold up with out some structure modification. Ugly too. This is not a recommendation, just a picture: https://www.tuckersparts.com/Spare-Tire-Bolt-Kit.html The diaphragm is a small diameter one to fit under the floor. These come as a "kit" form lots of vendors and do fit in the space pretty well. I don't think the T-5 is wider than the SM420 but I could be wrong. Ask in the HiPo section for better help.
Steve H
| | | | | Joined: May 2005 Posts: 8,878 . | | . Joined: May 2005 Posts: 8,878 | I vote for under the floor, cleaner and less work.
The T-5 is a small transmission, should have no trouble fitting a booster down there.
| | | | | Joined: Dec 2006 Posts: 206 Shop Shark | | Shop Shark Joined: Dec 2006 Posts: 206 | Hi guys
I've got a 1951 3/4 pickup.
I want to do power brakes.
I have a T-5 with floor shift...so I need the clutch.
Is a hanging pedal or under the floor booster better/easier????
Most under the floor boosters are made to work only with auto transmissions. I've looked at the bracket (under floor) & I think I can make it work with some modification.
I don't care about originality or looks. A booster on the firewall is also ok. Should I be afraid of any difficulties with a firewall mount? The firewall mount is much easier maintenance.
Just want opinions as to what's easier.
Thanking you in advance....Carl We have one specifically for the 3/4 and one ton. Under floor that allows stock clutch pedal. Are you using the stock pedal and linkage for the T5 clutch setup, or Hydro or cable? | | | | | Joined: Jan 2013 Posts: 1,084 'Bolter | | 'Bolter Joined: Jan 2013 Posts: 1,084 | My 48 came with one under the floor, and has 4 drums but a lot of stop. It's nice to have the extra room in the engine bay.
Allen
Yeah, well, that's just like, you know , your opinion, man - The Dude
1948 Chevy 3600 - goal Original restoration, Current Stage 1 - Disassembly and getting body in primer
1954 GMC 3100 goal Hot Rod, Current Stage 1 - Get body in primer
1931 Ford Model A 5 window Coupe - Old Skool Hot Rod
1945 Ford 2N Tractor - Runs great
1964 Ford 2000 Tractor - Use it every week
1974 Stingray Corvette
| | | | | Joined: Sep 2013 Posts: 1,367 'Bolter | | 'Bolter Joined: Sep 2013 Posts: 1,367 | Dave Chapman said "We have one specifically for the 3/4 and one ton. Under floor that allows stock clutch pedal. Are you using the stock pedal and linkage for the T5 clutch setup, or Hydro or cable?"
Dave, I'm in the exact situation as Carl; haveing a 51 3600 that I'm currently installing a T5 in using stock type clutch and pedal.
In a quick check of your site I didn't see the booster you mentioned. I've very interested in a booster/master cyl setup if you can help. May be best to email, I'm not familiar with forum rules for this area discussion.
RonR
1951 3600 with Clark flatbed, T5, 4.10 rear
1970 340 Duster
1990 5.0 V8 Miata (1990 Mustang Gt Drivetrain)
1964 CJ5
| | | | | Joined: Dec 2006 Posts: 206 Shop Shark | | Shop Shark Joined: Dec 2006 Posts: 206 | Yes is specifically for use with the stock brake and clutch pedal. You may have to make some mods to the trans cross member if your using it on a 3/4T, but the one tons didn't have any issues. If your using a cable clutch then you may have to reroute the cable http://www.hollisterroad.com/item/105062-master-booster-prop-brkt-kit-1125?category=5105You can always call with questions 713-937-0387 | | |
|
|
