1993 Chevrolet G Series Van (G30) Questions

All 1993 Chevrolet G Series Van (G30) Questions

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1993, G30, 155"wheelbase, 454cu.in., single wheel rear axle, Explorer conversion van.
Can you give me step by step instructions so that I can self install the motor on my driver's side window?
i need the fuel line from the fill door to the fuel tank, it's 1 3/4 inches ID by 5 ft. any suggestions
The van "bucks" at freeway speed only when maintaining speed- stops if I give it any gas or back off the pedal. I'm thinking a vacummn leak. Has throttle body injection.