[jeffahart]

Originally Posted by brownge

I'm putting a GM Hydroboost from an early 90's Astro van and a new Wilwood master cylinder (model 260-8556-P) on my '72. I bought the hydroboost from O'Reillys but it didn't come with the pushrod, spring, and retainer. Another member helped me find a site (http://www.tallonhydraulics.com/stor...ex&cPath=40_16) that sells these items but I need to know the pushrod length to order.

Do any of you have the same setup and could help with the correct pushrod length?

Thanks!

Seems like you should get a stock push rod and get it hanging through the firewall and then measure to the pedal. Someone has to have the exact same setup for firewall mount and same pedal. But would you still trust the measurement? I would assemble then assess the rod length. Or if that company has adjustable ones you might get close from someone's measurement.