Posted by pete 23 on May 16, 2010 at 19:12:32 from (173.87.144.56):
In Reply to: distributor posted by J Thomas on May 16, 2010 at 08:39:04:
Keep in mind you need a 25 degree advance for a 400 if it is still any where near stock. There are about six different advance distributors available, most common is 40 degree, next is 30. Just picked one up from a salvage yard a month ago or so. I talked to the guy and said I would take it all apart to make sure it was in good shape. He said, oh no, you will wreck it. I told him I have been taking them apart for 50 plus years and would take this one apart also. It was actually in good condition except for the cam, which was fine on the other one so used that. It was a 40 degree advance so I welded in the limiter hole and reduced it to 25 degree or there about, have to wait until I get it running for final tweaking. With a little math you can determine how large the hole needs to be. The springs are another story. You can buy new sets for adv you need or do a little pinching and or stretching. A time consumer but what else have I got. At any rate. You need proper advance total and a nice steady advance curve for a good running engine.
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