Shovelhead Inner Primary Part Interchangeability
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Joined: Jul 2018
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From: East Berlin PA
Shovelhead Inner Primary Part Interchangeability
My 1976 resto project has a inner primary with part number 60620-74 on the inside of case. The online IPC from www.ClassicCycles that I use lists part number 60421-79a as the applicable part number and makes NO reference to the part number I have. My question is: Are the two one in the same and interchangeable?
Thanks.
Thanks.
Seasoned HDF Member
Joined: Jul 2014
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From: Cental, MI
I believe the only change was the Cover bolts.. maybe 9 fasteners vs 8?? something like that... so Cover and all they interchange..
I have a -79A around here someplace... I will investigate further..
I can say, that with cover and all...I have Not had any 4-speed Primary that wouldn't interchange..
I have a -79A around here someplace... I will investigate further..
I can say, that with cover and all...I have Not had any 4-speed Primary that wouldn't interchange..
Seasoned HDF Member
Joined: Nov 2009
Posts: 15,705
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From: Farmington ,MS
I believe the only change was the Cover bolts.. maybe 9 fasteners vs 8?? something like that... so Cover and all they interchange..
I have a -79A around here someplace... I will investigate further..
I can say, that with cover and all...I have Not had any 4-speed Primary that wouldn't interchange..
I have a -79A around here someplace... I will investigate further..
I can say, that with cover and all...I have Not had any 4-speed Primary that wouldn't interchange..
The way the starter housing bolts on changed..from 79 up... one bolt went on from inside the primary and threaded into the housing...
With minor drilling and tapping you can make it work the old way...which doesn't require removing the primary cover to change the starter
Last edited by Tom84FXST; May 6, 2019 at 11:29 AM.
Seasoned HDF Member
Joined: Jul 2014
Posts: 8,604
Likes: 3,375
From: Cental, MI
The way the starter housing bolts on changed..from 79 up... one bolt went on from inside the primary and threaded into the housing...
With minor drilling and tapping you can make it work the old way...which doesn't require removing the primary cover to change the starter
With minor drilling and tapping you can make it work the old way...which doesn't require removing the primary cover to change the starter
Seasoned HDF Member
Joined: Nov 2009
Posts: 15,705
Likes: 22,718
From: Farmington ,MS
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