I found a mopar forum!

Longgone said

Hello Adam, you have found the best of the Mopar sites. You did that Spirit right by putting a solid Mopar drivetrain in it. :burnout:Welcome to FABO!

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Yep its got a 30 over 340/904 with a body 3.91 sure grip. My dad also has one his hase a 30 over 340 with indy revised aluminum heads and a 4 inch stroke with 904 and a body with 4.10 sure grip.