So, I had to pull a piston after a darn valve train issue at the end of last summer. (partially my fault)
The piston and #3 exhaust valve got into a fight. Piston won but the valve put up a valiant fight.
I pulled my original 420's out in 2006 and rebuilt them. These were the first high performance engines
I had ever built. With the guidance of my head/engine builder and the use of his shop this is the what the
crank and bearings look like after 9 years. Not too bad seeing that the first 6 years these engines were
at anywhere between 5000-6500RPM's the majority of the time. Cruise RPM's were 4800 peak
TQ 5200RPM and peak HP 6500RPM.

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good for 9 more years,lol.you must have done a good job when it was assembled.

What are you using some alien space age bearings? That's like going to the moon and back with all the boating you do. Nice work! I bet you run a heavy clearances or change your oil frequently. Either way you've done well.

Mine have looked like that also after many hours on my 454's, I run loose clearances I think that REALLY helps that, clean oil also...

I have no idea brand bearing, something Jim picked up for me. I'll mic it up later. I run them a little loose. Mobil 1 15w50 changed at the start of every summer. I only use maybe 1.5qts of oil for both engines a season. I do remember chucking the cranks up on Jim's lathe and polishing them up to 600 or 800 emery cloth,

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Rookie, instead of changing you oil at the beginning of every season, change when you put it away and make sure you start it and run it for 20 min (to circulate the new oil into all the lifters and such). This way the engine is stored with the best possible additive package your Mobil 1 can offer.

In the spring, just jump in and fire the motor up, no need to change the oil again.

Ken

Youre doing it wrong. Need to tighten those clearances up, and go with 5w20.

Yup, and run the engine cooling water at 200-210*F.

How many hours in 9 years?

For sure. Gotta get some heat in them, make more power too.