Power brake booster interchangeabiltiy

[240L31]

Hey,

will a later model 240Z power brake booster ( 8 1/2") fit in an earlier model (with 7" booster)? In other words, is the firewall bolt pattern the same?

Thanks - I couldn't find a definitive answer for this

 

[jonbills]

This suggests that bolt pattern is different pre and post '74. No personal experience
https://www.classiczcars.com/forums/topic/55729-240z-7-power-brake-booster-new/

 

[Robbie J]

I put an MX5 one on.

 

[240L31]

I put an MX5 one on.

Which modifications were needed to make it fit?