[SCOTI]

Originally Posted by boatpuller

Well I finally got around to getting my vacuum boost system swap install yesterday. I paid a shop to do the most of the project as I'm unable to bend over the fenders anymore after 3 back surgeries and fused spine complete with rods and bolts.

Anyway, the interesting thing after this thread and talking to a few chevy truck guys. It was evident that I needed a vacuum pedal from an automatic 1/2 ton from a donor truck.
I find one for 25 bucks at a local junkyard. I go to pick the truck up and the guy that works on it tells me he spent several minutes getting the old pedal out in 90 degree heat only to find it was exactly the same as the one from the 77 c10 auto donor truck.

I thought this may be interesting to you guys that posted on this thread. My conclusion is there is no rhyme or reason to the how the factory installed pedals. Kinda what Scoti went thru in his swap.
Oh. by the way the truck now stop awesome with Cpp 11 inch booster and mc. If anyone cares I will post a pic of the final swap.

I would venture to guess yours having the same pedal had something to do w/it being 1/2 ton.

I drove mine over to work last week a couple of times to free up shop space for another project & it seems to stop fine. But, I was basically just idling along (I can walk from my shop to my work in under 2mins so it's not a long drive). I still need to replace the master cylinder & then will see if my combo of parts now will work w/o damaging the master cylinder.