Anyone run late main brgs in and early block? 360 SB

I realize the early 70-73 360 list a different main bearing than those 74 up. The thrust bearing diameter is larger on the later bearing. In the past I haven't questioned this only installed the bearing that matched the year being built. Today I have a 360 for a friend on the stand and no place to get the early style bearing. I installed the later main bearing set that I had on the shelf and can find no problems with this. Any engine builders have any input? Thanks to any who have done this or maybe found a problem that I'm overlooking?

don't know but I seen 2 360s on craigslist for $100. here's the guys number if he still has them. 904-742-0907

Where would I put 2 more? Back to the original question. LOL

I thought the width of the thust flange to flange was slightly different? Like .004 Not sure. But you should check the thrust clearance real close and see what you have. It may be too much or too little. Factory spec is .002 to .007 with max allowable being .010

It is the diameter thats listed as different. I've installed and set the thrust,dial indicator claims .005" clearance,can't figure out what problem I'm overlooking?

If the block is machined big enough in dia for the later bearing to fit, then there should be no problem.

I don't know about 360's but I suspect the differance is the same as early vs late big block bearings & this photo should explain the change...



Thanks to Brandon @ 440 Source for the photo...

Bearing width & diameter are the same, it's the thrust face diameter that is larger...

Right. The late(wide) thrust bearing fit's well inside the relief area in the block and cap. Therefore my question.

I'd like to hear it from a professional engine builder but it seems like it is Ok to me...

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Right. The late(wide) thrust bearing fit's well inside the relief area in the block and cap. Therefore my question.

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If the bearing fits and the crank spins then you don't have an issue , on a big block there is no way you would get the large thrust bearing in an early block as the picture above shows .