318 LA roller block questions

A Poly strikers fist is in the pistons alone as everything else is the same as an LA (which I’m sure you know)

There was a 4.25 crank made a while back (I forget who offered this) but as you noticed what a Campbell offers, Hughes engines also offers a 4.17 stroke crank and/or an entire rotating assembly.

While piston speed and crank bearing speeds are a concern, few ever actually reach that level of rpm. I also see it this way, if a NHRA 500 cubic inch engine can rev 10 or 10K plus, why can’t your engine? So long as the oiling is taken care of, now your down to valve train components being up to task.

When you get there, you’ll notice the cost is prohibitive to most people.

I do t know what the journal sizes are to the 4.15 crank but ahi he’s engines uses a reduced size. I forget what it is at the moment. BUT!!!!! If there is enough meat on the journal to grind it to a 4.25, now it’s just more money.