Yeah, I'd be after firewall flex; in fact, I've heard of some with 924's with boosters or clutch pedals that'll start tearing the sheetmetal of the firewall due in part to sticky pedals/linkages. Must be that common VW Rabbit heritage we all share...

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Vaughan Scott
Detroit Region #280052
'79 924 #77 ITA/GTS1
www.vaughanscott.com