Really easy. Totally bolt in direct replacement with the addition with one wire connection for the solenoid which is easy, it comes with the prefabbed electical wire and a easy to read diagram (just request it). My block had studs holding on the stock starter which were too short, just removed them and swapped in longer bolts. Less than half the weight and size and spins like crazy.
I thought it was going to be a generic product but it turned out the be a brand new Bosch unit. Note the quality features in the description compared to some of the cheaper ones available. I looked at some priced $20 less but this one seemed of better quality and thats what it turned out to be.
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