350 swap project
#51
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Location: Littleton, CO USA
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Yes, it can (and should) be done. In my search of your head casting #, I came across someone selling a set that said they had hardened seats. Your pictures aren't completely definitive, but I looked as best I could at them before I posted, and it does not appear as though they have hardened seats. In the other site, I would believe them based on their photos.
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