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Vehicle Information: Year: 1975; Body Type: Targa;

I have owned my 1975 Porsche 911 Targa Carrera for the past 29 years. It has about 32K miles on the clock NOW. THEN -While in running condition and, for a period of 15 years, I placed the car on blocks and then additionally blocked the shocks to a mid range position. All of this was done because I intended to do great mods like install the then new pressure fed Carrera chain tensioner system and other stuff. I actually ended up putting in long hours at work and with the girl friend. And I did nothing to the garaged Porsche. The Porsche was in an enclosed garaged in Southern California. My question has to do with rubber suspension parts. The car is now, and has been on the road for five years. Before the launch, Not that it needed it but I did it anyway, a completely overhauled engine, line bored replete with case savers, ARJ racing studs, new Nikasil Pistons and Cylinders, ALL Porsche engine oil mods by Andial, SSI heat exchangers. The steering has Turbo spherical joint arms, new ball joints, and a solid aluminum cross member. Everything else was checked out at a professional Porsche garage it runs like a bat out of hell and for that I am happy. What I am not happy about is that it feels different. I feel like I can sense running over pebbles in the road, and every bump is intense. My thinking is that the rubber inserts in the A arms are dried out from years of sitting thus the harsh ride and occasional sqweeky sound as I go down the road. What exactly should I replace? ALL of the rubber internal and external to the suspension?. If I replace the 1975 A arms with new turbo 930-341-901-00/01 instead of 911-341-901-00/01 arms is that a better steering choice (aka handling)? Should I press out the trailing arm bushing AGAIN. They were replace before the storage about 20 years ago when I R&Rd the trailing arms, hydraulically pressed out the old wheel bearings and pressed new ones in. I also cleaned and repacked the CVs at that time with Porsche CV grease. So is dried out rubber the reason for my ruff ride? Also - I do not have low profile tires. Hell finding reasonable performance tires for 15 rims is hard enough. The rims are the original 15X7 FUCHS and 15X8 FUCHS. Both have been checked for true run. I currently run Michelin Pilot Exalto 205/55 ZR 88W and 255/50 ZR 91W tires. Thank You! Bob

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