Engine build opinions?

I have to agree with these guys sounds a bit high with your build add-on's.
With the 1:1 the GPS will tell if the tach is good or not.

Don't get me wrong- if that 6k rpm is legit, I'd be looking at a 430. I just wouldn't necessarily believe it without better data. If, in reality, you're closer to 5500, then the 540 is probably what I'd keep on there.

It's possible that you have a fast hull that's giving you a higher top end than is typical with the gt40/gt40p upgrade, but I'd be darn sure that's the case before re propping. Get a shop tach and compare it to yours and see how close they are. If original, I wouldn't put much faith in the old Teleflex. Also get a GPS on the thing. If you're doing 53, tht alone would make me think the tach is lying. If its 56-57, that's something else altogether.

While I wouldn't spin the thing to the moon, going to a larger prop puts more stress on the engine and tranny, so keep that in mind.

I agree with Pete. The numbers you're claiming are a good bit beyond what we've come to expect from this combo. Verify the tach is correct and get a GPS on the thing. Alan's 55mph 380hp '81 ran 5800 or so with the 540 and required a 430 to get the revs back down, but I don't think you're quite at that power level.

why didn't you stay in it? chicken?

the airguides only go to 50 and they were pegged. I backed out before it hit 6. It was still pulling.

She runs awesome. The only issue I have is it will run 5900 rpms. I have the acme 540 and not sure if I should re-prop, but at what point is too many rpms on the 351. The rings and bearings looked new, so we didn't tear it down completely.

I backed out of the throttle as it hit 5900 rpms. I know if I stayed in it, it will hit 6000 plus. What do you guys think?

Which way did you tilt the carb, and how much, I can see the tilt on mine too,my motor sits pretty flat in the boat. With the engine being backerds I might need to go the opposite way.

The tranny would be that much work, the Vdrive has about 3 times the hoses though. That ones pretty easy to talk myself out of because I would have to pull the backseat, panel and floor to show it off. I did have some floor epoxy color matches to silver cloud for the bilge. Hopefully it will go on pretty smooth and I won't have to sand and polish to make it shine which is why I passed on the gel.

Wow that looks amazing, very nice job

Lookin good

DONE! Ready to fire. Now all I have to do is get the snow removed from my driveway!

outstanding

It's finally back where it belongs. Just exhaust left and ready to fire.

That looks great, what dis you use in the Bilge?   I just had some floor epoxy color matched to Silver Cloud, hope it turns out like that.

I'm conflicted on the exhaust and have figured out how to build a Captans Call using the Invertaflow, now I just need to win the lottery so I can afford to do it. For the time being I'm sticking to the invertaflow so I can enjoy the small fortune I've spent on the stereo.