LT1 Z/28 ingtion modlue
i just got a 1995 Z/28 with a LT1 an guy thought needed a opti spark dist. but day i got it home it started! but when engine got to running temp it cut off an had no spark from coil! but doing system check has pluse from opti spark dirt. so i feel not dist! an it's ingtion modlue but the dam thing $185.00 am local salvage yards want $75.00 to $80.00 for it, an being electric part there as is! so has anyone ever tried to use a module from early type HEI with vacum advance, being there both a 4 wire system, i have schematic for the opti spark system, anyone have one from early HEI see if maybe can wire an early type in as i feel both get there pluse from dist. an has anyone ever tried this?