right at the beginning of this thread, i wrote that the motorcraft shaft is 17/32" while the prestolite and delco - both points and hei - are 1/2", and that i used my old points delco gear on my 'new' hei. ken ames is right about the duraspark upgrade for the motorcraft dist; i found the info with a search for 'tfi tuneup'. " From: Matt Shumaker <mshumaker@xxxxx> " " What Jim Blair wrote sounds correct. I made this swap in 1999 or so I " think. (Where does the time go?) So my memory is not exact. I may " have bought a purpose-made distributor gear that fit on the GM " distributor. I recall that the distributor gear I used was a tight fit " with no wobble. 1999 was a time when many of the AMC cars with BBD " carburetors were still on the road, so the HEI conversion had become a " sort of cottage industry. I bought my conversion from an online source " that had been linked from the old AMX-Files website and list. " " " > ---------------------------------------------------------------------- " > " > From: Jim Blair <carnuck@xxxxxxxxxxx> " > " > You have to be careful when you do the gear swap because the Motorcraft ignition gear has a bigger hole and will wobble on the GM HEI shaft and wipe out itself and the cam gear. " > " > I recall the first year of HEI was '74 on the inline 6 GM motors. 250 and 292 until the last GM inline 6 in '85 or so (I think the G series vans were the last) " > They had an in cap coil and external coil on the same base with different cap/rotor styles and pickup coil as well as harness was different. ________________________________________________________________________ Andrew Hay the genius nature internet rambler is to see what all have seen adh@xxxxxxxxxxxxxxxxx and think what none thought _______________________________________________ AMC-list mailing list AMC-list@xxxxxxxxxxxxxxxxx http://list.amc-list.com/listinfo.cgi/amc-list-amc-list.com