I might. DDM actually sells 320 cases and cylinders way cheaper than 34/36 stuff. I guess due to low demand. The cases use regular engine mounts?
little confused about rod length comment. if you lengthened the rod to get tigther squish the piston will free port. At TDC there is only about .020"...
in my experience, which is limited as I've ported maybe 6 engines now, big blocks have the same if not lower RPM due to piston weight. So the only thing they can do is make more torque. And the torque they make is going to be a fairly marginal increase. For me so far the best running engine has...
many people use klotz super techniplate and you will absolutely not go wrong with it. it smells very good on top of it. Technology hobbies sells it by the gallon for $45.
not sure if this would work for you but its a square insert for standard collet
https://zippkits.com/index.php?main_page=product_info&cPath=85&products_id=608
do not use EC5 they are too small for out boats. Get QS8, 8mm bullets, EC8
these are the best Ive ever seen and I highly recommend
https://www.smc-racing.com/index.php?route=product/product&path=66&product_id=762
it looks like an 1/8th scale so it will use 8s. 850kv is about perfect something like a TP 4070 or a 5692 rocket RC motor. the goto bad boy ESC is a Castle XLX2. budget esc ZTW 200A. I'd personally get a set of SMC HCL-HP 4s packs wired in series for it.