niner11 Posted October 17, 2007 Share Posted October 17, 2007 I've got a late 74 260 that I converted to a turbo....well my brake booster just developed a leak and I am having very little luck finding one locally for a 74. Does anyone know if a 78 280 will interchange with my 74? I am a ware that a zx booster will not work but can't find any specific posts that talk about swapping one for a z. Thanks, Chuck Quote Link to comment Share on other sites More sharing options...
zcarnut Posted October 17, 2007 Share Posted October 17, 2007 Provided your Z is a two-seater, you can use either a 1975-78 280Z one or the larger 1979-81 280ZX brake booster. You can even use the later (1982-3) ZX booster provided you also swap out your master cylinder. The ZX boosters have to be installed upside down in your 260Z, but the will still function: http://forums.hybridz.org/showthread.php?t=112593 Quote Link to comment Share on other sites More sharing options...
blueovalz Posted October 17, 2007 Share Posted October 17, 2007 I believe the bolt pattern will allow the swap, IF the diameter does not interfer with the clutch master cylinder. That was where my problem came in. I believe (it's been a LONG time) the 280 will fit, but it will be within a 1/4" of the clutch master cylinder. Quote Link to comment Share on other sites More sharing options...
niner11 Posted October 17, 2007 Author Share Posted October 17, 2007 Thanks for the link. When I looked at all of the auto part stores online nothing was listed for a 74 but if you look up a 78 and start cross referencing it shows the part number that I have seen posted here before. Cardone 535104 which is an 8 1/2 " booster. The price is currently 91.88 plus core and a much better option for me than MSA. Thanks Quote Link to comment Share on other sites More sharing options...
niner11 Posted October 17, 2007 Author Share Posted October 17, 2007 Terry, I noticed a 10" and an 8 1/2" are both available relatively cheap so I just measured mine and ordered the smaller of the two. I figured that the check valve had gone bad and boost had killed my booster but it seems fine. This newer motor pulls much better vac so maybe that was the cause. Thanks Quote Link to comment Share on other sites More sharing options...
pch Posted March 23, 2008 Share Posted March 23, 2008 My booster went bad in my 71 240z....can I also use the 78 brake booster of a 280z? I am looking into buying one of these http://www.autozone.com/N,308555/initialAction,partTypeResultSet/initialN,14400143/shopping/vehicleSelect4.htm I am assuming to buy the smaller one. Any modifications that I need to make. Quote Link to comment Share on other sites More sharing options...
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