You'll figure it out. Is that really not normal though having the mirror shake. Sometimes when I'm driving the mirror shakes enough where its blurry and its difficult to see out of. I mean these are almost 40 year old cars and with a 351c making any decent amount of power with a non stock cam, the chassis will absorb that. Maybe I need to go for a ride in someone elses Pantera and see what its like. I have an internally balanced a4 based 308 professionally prepared with a blower making upwards of 900 flywheel hp, and with the solid motor mounts in my mustang, it absorbs everything and that car is solid. The motor mounts are a big deal, I'm guessing yours are in good shape? Have another Pantera owner with a motor making some decent horsepower go for a ride with you.
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