So I decided to roll the dice on this 3 port engine.
https://www.amainhobbies.com/sh-engi...-p3xbg/p976434

I decided to start the break in process this past Sunday. I looked at the insides.
13mm crank, silicone filled, 1 slug, some grinding. Standard bearings.
The sleeve also has some minor work. Nothing to jump up about.

But so far I must admit, I am very impressed. I have my own break in process, pretty much what Gord Tessmann does. I just use a quart of VP golden break in fuel for the initial 10 tanks.
The motor never missed a beat. I look forward to getting the car on a track with 30% race fuel. I will follow up once I have more time on it.
I predict it should be a good small track club motor.