The guy with the blown 21' Eliminator Daytona. , I think his name is Mike (don't know his screen name) went and got a bowl gasket for TJ, the other 21' Daytona.

Are you looking for paint or gelcoat?

Just another option, TRG Fiberglass 626 991 9031. Todd is in Rowland Heights.

You beat me to it, I was trying to find Todd's number. 

Todd does both paint and gelcoat and has been involved in paint and repair on some of the baddest jet boats in So Cal.

I'd run the sewer hose.  It's just blowing fresh air to ventilate the bilge.  I agree on using proper materials, and if this was for fuel or
oil, I would definitely say use the best hose you can afford.  This application, I don't see what you have to lose.

Those are stock floatation from the builder.  They actually are my favorite type of floatation.  If they are still holding air, I would put them back in in a heart beat.  They weigh nothing, can't hold water, won't rot, and if your worst boating day happens and you sink it, they will help keep the nose afloat so maybe someone can attach a line a drag it back up or at least pull it to the shore.  If you don't want them, I would gladly take them off your hands.

Are you taking the boat in your avatar?  I haven't been to Perris in several years, but last time I was there I got kicked out before I was barely in the water, in a stock daycruiser with logs for being to load.  Then they wouldn't refund my money.
 Elsinore is nasty, but it's hot rod friendly. Just a heads up.

Cold is more accurate reading.
 Is this a little or a lot of oil blowing out?  It seems like you have bigger issues than oil coming out the dipstick tube.  You say you have a spark issue?  What do you mean.  You said it won't idle,  can you keep it running if you hold the rpm up a little?  Is the carb still flooding.  This is a little difficult because you have multiple issues going on.

Maybe I should ask what is the issue your tuning out/for?  Usually oil blowing out the dipstick is caused by excessive crankcase pressure.

How well is you crankcase vented? If you're not vented properly, the pressure has got to go somewhere.

Any chance you can measure the steering cable for me?  And did you sell the gauges?

Under 20% is considered acceptable.  Frankly, I use this more to diagnose a problem, finding out why a motor isn't running right. Racers like to do these looking for any little edge they can find.   If your motor isn't an all out max effort race motor, and you're just monitoring wear, this kind of searching for trouble can drive you crazy.
 If you rock the crank back and forth a couple degrees while doing a leak down you can change the readings quite a bit.  What I mean is, at TDC you may have 20% + leakage, but you can rock the crank a couple degrees one way or the other and all of a sudden your leakage drops to 6%.  So is the cylinder bad?  Do you maybe have a valve that's worn a little and not sealing quite as well as it used to?  Maybe a little carbon build up.   Is there a scratch in the cylinder? See, this can make you go crazy. 
Monitoring  how the motor starts, idles, accelerates will tell you a bunch about your motor condition.  Watching your spark plugs for things like oil consumption or excessive unburned fuel will tell you you're getting close to maintenance time.  hope this helps.

So then is 5500 all you can pull?  If you want to get to 6000, then you could start taking a little off the impeller to get that next 5-700 rpm.  Here's a impeller calculator I took of of Tom's web sight, you can play with this and see.

http://www.jetboatperformance.biz/pages/Jetdrive_Impeller_calculator.html

Yes on the gps. No pitot speedo. Turning an "a" impeller to 5500rpm. How fast with a "B" or "BC".

It doesn't really work like that.  You find where your motor makes peak power and then you run the appropriate size impeller to match that rpm.  So if you're already at or past peak at 5500 rpm, running a smaller cut will be going backwards.  Plus you'd probably kill your bottom end.  This is why most stock motors run an A cut.  There power is all in by 4000 rpm usually.