The Taylor's I put on in the 80's were still nice and flexible in 2012 and fit perfectly! The bad thing is they were solid core and did not work with my Pertonix III. The new surpression Taylor's are just as nice but required a bit of shorting to fit the Mopar 383 stock application they listed for the set! Also if you want closer to Factory authenticity some of the distributor ends have to changed to 90's.