Help With Starter Motor Part Number

[mrein3]

Help.
I need to replace my starter motor. I saved a thread from a few years ago that stated ACDelco Gold 337-1011 Starter for $80.97 on the jungle website is the starter to get.
However, the amazonconfirmedfit tools says "! This does not fit" your 1971 K10 Pickup"
So I change it to 1972 Chevelle 307 which is the engine currently residing in my pickup. It too says "! This does not fit".
So I change it to 1971 Chevelle 307 and you guessed it, "! This does not fit"

The jungle website suggests another ACDelco Gold new starter, 336-1860.
When I go to Rockauto and click my way to starter for all three above vehicles they all say 3361860.

The only difference I can see in the pictures is the two starter mounting bolts on 336-1860 are one long and one short where the 337-1011 has the two mounting bolts both the same length.

So I rolled under my truck and took a picture of what has worked on the 350 (not original) that was in the truck when I bought it, the 383 I had in there for about 10 years, and the 307 that is in there now. It has the two, same length starter mounting bolts. See pics.

So do I order the 337-1011 which appears to be a direct replacement to what I have now or get the 336-1860 that Amazon and Rockauto both say is stock for all three applications and then screw around for three weeks getting the correct length bolt for that shorter side?

No comments on the oil dripping on the starter. You'd leak too if you were a small block and in your third vehicle.

[Steeveedee]

Oil keeps the rust at bay. If it isn't your daily driver, take it off so we can see what you have. Some blocks are tapped for both the staggered bolt pattern like the starter you show, and the straight-across bolt holes. Can you look up online to see which tooth count flywheel/flexplate you have?

[ray_mcavoy]

You'll want the #337-1011 that's like the starter you have on there now. That style (with the two equal length bolts staggered one ahead of the other) is used with 14", 168 tooth flexplates.

The #336-1860 (that takes one long & one short bolt, straight across from one another) is for use with the smaller 12-3/4", 153 tooth flexplates. Even if your engine block has the holes to accept this starter, it won't work with your existing flexplate.

[mrein3]

Originally Posted by Steeveedee

Oil keeps the rust at bay. If it isn't your daily driver, take it off so we can see what you have. Some blocks are tapped for both the staggered bolt pattern like the starter you show, and the straight-across bolt holes. Can you look up online to see which tooth count flywheel/flexplate you have?

Originally Posted by ray_mcavoy

You'll want the #337-1011 that's like the starter you have on there now. That style (with the two equal length bolts staggered one ahead of the other) is used with 14", 168 tooth flexplates.

The #336-1860 (that takes one long & one short bolt, straight across from one another) is for use with the smaller 12-3/4", 153 tooth flexplates. Even if your engine block has the holes to accept this starter, it won't work with your existing flexplate.

Sorry I didn't get back to this sooner. This week was our small town's summer celebration so between doing stuff there and getting the convertible polished up for the parade I didn't have time to do anything online.

My truck isn't a daily driver but in the summer I drive it nearly daily.

Funny thing about the flex plate. I recall now when I pulled this 307 out of my Chevelle in 1989 or so, and put in a 350 I refreshed in its place, when I went to start it the starter was not engaging the flexplate. Back then Midway Chev on University in St. Paul was close by so a quick trip there for the larger flexplate fixed the problem.

Sorry. I'm easily sidetracked.

I will see what the jungle website has for deals for that #337-1011 starter on prime day.

[mrein3]

Oh and thanks for all the help.