John Snoe

Howdy everyone, names John! I picked up a 1986 chevyCs10 on solid air ride all the way around. The kid had just finished dropping in a 350 i beleive out of an old truck. Motor looks fresh. New paint nice and clean. Says it was running when he got it back from the 350 install. Now he told me he started wiring the electric fan and heater to a constant 12v ignition wire through a power block. Now the truck doesn't start. Key in starter spins but there is no power to the fan or multi spark. Any help would be great before I start ripping the electrical apart. Thanks in advance!!