They are icon off the shelf flat tops 2618. I received the now balanced rotating assembly from the machine shop and will be found a final mock up to check everything one last time. The crank and rods are Callies compstar stuff.

Just a little update here, The boat picked up 12 mph from a 502 mpi to the new 540, I'm happy and cant wait for the M4 and better drive.

Here's a quick clip

https://youtu.be/M76Nhbobk3E

What camshaft did you end up going with ?

Dyno?

I ended up going with a custom cam, 245-250 and 650 lift. It pulls to 5500 rpm up here at 7000 da. I didn't Dyno it but probably should have I just ran out of money.