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In case anyone is missing it, the 89 uses a coil in cap screw down, everyone and everything (summit and jegs application finders and techs, accel part finder,...) that tells you it isn't, isn't qualified to say the 8131 is incorrect.
The 8131 is the one I bought for my car.
When you look at Summit it says the 8131 fits only 90-91
weird
I called the parts house they had a 8132 in stock and it was not coil in cap http://www.summitracing.com/parts/AC...n/?prefilter=0