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There is no civilian equivalent,it is the same as the multifuel 5 ton,available from any MV parts supplier.

Good score! The 673 is a excellent powerplant for the M39 series trucks,they don't have the power band of the later "high torque rise" Macks,but they will still out pull almost every other 5 ton,reguardless of series. Hopefully all you will need is a filter change,the Napa numbers for the...