Not sure he realizes what a 540 is. Or the fact everything he already bought would be useless

Not a big deal to make a 540 out of your 502 block but the block leaves alot to be desired. The oil system in a Dart block is much better. As far as a cam centerline it depends when you want the torque to come in and how much your gonna spin the motor. If your question was worded wrong I would go with a 114.

No red I have a 502 block. Sitting at the machine shop. I bought a magnum Xl 4.25 stroke ,Oliver rods 6.385, and je pistons .30 over .. 4.50 bore. I have a 8-71 littlefield blower and was just trying to see what opinions on the block I have vs dart block that's all. I also just wanted to know about reversion and when it starts on a cam and that's all. Like I said before my first high performance boat.

And haxby it was a error what I wrote. That's all. I bought everything for a 540 but have a 502 gen 6 block that I'm putting in a Daytona.

You spent the money on some good parts. Minus well get a nice block to put them in. Sorry I can't help you on reversion cams after my first milkshake I've always ran dry exhaust.

How much money you want to spend? What heads are you going to use? what RPM you going to spin to? what boat is it going in? 731 is a really mild cam for a NA 540. Even a 741 in a 540 is a less than you need. I don't do blowers, so the others will need to tell you that. The 502 block is fine for a 540. Unless you have $$$$ to burn you don't need a Dart block.

Gotcha, that makes more sense. If you've already got the gen6 block and it sonic checks ok, (they're usually pretty thick) then id run it.

Black my question is worded wrong. I was just curious when reversion would kick in or is it manifold or header specific. Also haxby and red you got to understand this is my first big engine boat. In cars I never worried about sucking water. I'm not a ****in idiot go to June 2001 super chevy mag and the Malibu they did a piece on is mine runs 7.73 181 mph and I drive it to sonic every other Friday. Except for engine I did everything else including stitching my own interior inc. the leather wrapped 14 point funny car caged bars. Go to Barrett Jackson last year loom up 69 chevy camaro yenko. Yep I did it but didn't own it. It sold for 175,000 moral of the story is I'm not ****in stupid.

Money isn't the issue. It's a how much am I gonna have in a boat that will be sold in a year issue. But I don't want someone else taking on a problem that could have been rectified. If it's a good block for say. 750 - 800 hp than cool. I got ****ed from the beginning on the boat and I want it to be right. I want it built like I'm gonna keep it then we sell. As you can see from all other posts I sold the gauges. Old rotating assembly. Etc,etc. this year before summer will be all mechanical and this winter we will repaint with kickass graphics and sell in 2015 with new interior also. Some say its fine some say dart. Just was wondering.

Wow that's impressive. I fixed a Camaro that sold at Barrett Jackson for 140000 and almost burnt to the ground cause someone Mickey moused the wiring.