I would go with the Quad IV's again in a heartbeat! With stock 330's I'm getting 63 MPH (GPS) at 4400 rpms, thats 7 percent slip. Midrange is around 43 mph at 3400 rpms. Its taken a bit of time to learn how to drive with them because they need so little trim until your around 54+ mph. With Mirage props I always trimmed right away.

As to your engines, do you know what cams were put in them? I'm in the process of doing something similar with a pair of 365's that I just picked up and I would like to get the 425 hp mark.

Put a set of Weiand 177 on them. Change the fuel pump add full roller rockers, run them at 5 psi and I would guess your at 425-440 PSHP.
Then if you want more later, upgrade the exhaust, valves, add a crane #139011 cam and get up around 500PSHP.....
Then add Alum. heads, add intercoolers, more boost 575PSHP?????

Not interested in going the blower route, a simple cam change with better exhaust and I'm at 425. Blowers are a big pain in the a$$ plus they use more fuel than the same HP N/A engine. My last engine in my 242 was putting out 525 hp out of a little 439. It cost some bucks but it was problem free and ran great.

smart man

motors have comp cams camshafts in them flat tappet also hp 500 heads boat was my friends he has the cam cards also

I do have the cam cards at my lake house. I'll get you the info next week.

Thanks

nice boat. Looks a-1 shape.