Planning on a 90's 1 ton frame/drivetrain swap. Based on some rough measurements it looks like it will fit with some firewall clearance, but even the intercooler will drop between the front fenders.

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gonna shoe horn a cummins in there? wow,,,can you say move that fire walll,,,kool project,,,we put a cumming in a 1 ton 1975 dodge van,learned a lot then, wasnt my van,,but the van rotted away the low mileage cummins is sitting under a bench where it will be for ever i suppose,,,