Carb'ed or fuel injected?

You've verified you get spark at the end of the spark plug wires? If so, have you tried using starter fluid injected into the carb or throttle body to see if it will light off? If it does light off, I'd suspect a fuel pump problem.

Regards,
Eric W.

'89 Dodge Raider -- 3.0L V6, MT, SWB