Is there any way to PERMAMENTLY eliminate rear main oil leaks?

toolmanmike said
I am thinking more of the overall strength of the engine.

…which has also more than proved itself over the last 65 years.

toolmanmike said
The 225 was rated at what 145 horse.

In stock 1bbl form, yes. 196 (conservatively) with the '60-'61 Hyper-Pak setup, and over the years a lot of people have made a lot more than that with them. High compression, turbochargers, superchargers…it's all been done, and the motor stays together.

toolmanmike said
I am surprised that any added power enhancements can live with the4 main block.

Donno what to tell ya…reality is surprising sometimes.

toolmanmike said
I am surprised Ma Mopar didn't build any 6 cylinders any bigger than the 225.

They did (245, 265) in Australia. They looked at enlarging the \6 to 246, but a wall in the block got in the way; they didn't want to spend the money to rework it.

toolmanmike said
I come from John Deere country and none of their gas or diesel's would live any length of time if they were 4 main engines. Just not strong enough.

Fair enough, but this ain't that.

(Chrysler did put seven main bearings in the diesel Slant-6)