I have a '85 F-150 4WD with a 302 5.0L 4V H.O. from an '84 Mustang GT. It ran good for a couple of months and then it just wouldn't start. I check the timming and found out that I had to change the timming chain because it was jumpnig time. Ahter the change it still wouldn't start, so I changed the dristributor to a Mallory Unilite Mechanical Advance with a Promaster Coil because I thought the distributor might have been bad, still no luck. Timming still checks out O.K., and it is getting plenty of spark, and plenty of gas. Can Anybody HELP? Also, when you check the spark it has a reddish orange color to it?