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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!
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| | | Joined: May 2005 Posts: 82 Wrench Fetcher | | Wrench Fetcher Joined: May 2005 Posts: 82 | I have a 327 & m21 4spd with the power brake conversion using drim brakes.
I used a mount bracket that bolts on where the original master cylinder fits & I think I got it from CCP (?) or Brothers.
It works well with a 10# pressure valve in the front brake line.
My only concern is that the master cylinder winds up back under the seat & I had to cut a hole in the floor to fill the m/c.
The other problem is that I can't get the speedo cable to clear the booster & hook up.
1949 chev 3100 3 window. 350hp/327/m21 4 spd, 12 bolt rear, power brakes, 3" dropped axle from Sid's. Disc brakes next.
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