if the pedal is violently pressed while running in second gear, it dies for a moment,makes a detonation and spins the tires . [/quote]


Has someone put a small bolt and nut to make the secondary open manually? Seen it a bunch of times. Engine falls on its face and then goes like a scalded dog. If someone has put the bolt to manually open secondary, take it out, problem will more than likely be fixed.

I would take the vacuum hose off of the vac. advance and plug the port. [Unless your trying to get better MPG or need to pass emissions you don't need vacuum advance]. Then set the total timing to 38*. drive and listen for ping. If pinging reduce timing 2* and re test drive. If not pinging at 38*, try 40*. With a bigger than stock cam I would recurve the dist. to get around 20* at idle and 38* by 2200rpm. Remove heavy spring and add Mr. gasket springs, both on same side. Leave the weaker spring alone or make it longer by 1/8" so it doesn't have to be stretched to go on pins. Be careful not to over stretch it or you will have to find another one.