Newer plastic style master cylinder

Blownfish said
I never seen two different length A-Body rods, I've used the 73 up master cylinders on the older cars with no other changes, how long is the rod you have? What master cylinder are you running? I have one out of a 85 Dodge truck but I mocked the car up with a used one out of a 80 Diplomat, both were identical. My adapter is 3/8" thick and when I mocked it up the pedal was a little too low for the brake light switch and when I pulled it up to see how far off it was, the rod fell. The company I bought my adjustable rod from said that they do fall out, that and to get the pedal height correct is why they made the adjustable one.

Some cars may not need the adjustable rod but I would double check before you test drive the car, this is not an area that should be over looked.

been driving the car a ton since 2006 with it set up this way.

i already stated that i am running a wilwood master cyl. (looks just like the mopar one). and i believe the rod hole is the same depth (not 100% sure but pretty sure) not sure how long the rod is. whatever the 73-up disc brake cars have. i'm not sure if there are different length rods i was just stating what i have in case there were.

only reason i went with the wilwood master cyl was out of all the local places i could only find one alum master cyl and that thing looked like they hit it with a hammer or something. its a crap shoot when you order one if you'll get an alum one or a cast iron one. i didn't want to wait so i called RMS and i had the master cyl the next day. i asked about the rod being too short because of the spacer and bill said it wasn't a problem because the master cyl. hole is about 3/8" shallower then a stock 73 style master cyl. which would actually make the rod too long. the spacer being 3/8" corrects that and puts everything in the proper location. atleast it did in my case. it all worked out fine. that rod is really in there. be tough to pull it out on a work bench let alone just tapping it by accident driving down the road. and then the brake light switch is there too. you would have to really pull hard and bust the brake light switch all the hell up to get that rod to fall out of the master cyl. but hey man everyones car is different i guess. maybe its the wilwood master cyl that makes it work but it worked on my car and i have a lot of miles on it since doing it in 2006.