No, solid roller with some more duration. 290 3?? Wanna downsize a hair and run a hydraulic lifter.

Curious, what heads are you going to run ?

BMF or Profiler conventional whichever we can get faster. My friend/machinist does a BMF headed 632 for drag race guys 11.7:1 makes 1180 on another engine builders dyno... I think the big chief stuff is to large for a 632 in a boat they like alot of rpm.

I would think he's pushing a lot of RPM to do that, I could be wrong. A small runner symetrical head may make more even power across the cylinders, I don't know if Dart makes one. From what I've read both Profiler and BMF make some good flowing heads. I've only run the solid rollers, but I would expect a hydraulic roller of the size you're talking would have a lot of seat timing and not idle very well. No clue of your application but it sounds like fun.

Another option, http://www.raceflowdevelopment.com/R...ock-victor.htm

That would be my 1st choice cause of the 2.400 intake valve but trying to get anything from Curtis right now is just not happening anytime soon...