I knew when I wrote that it sounded like a critique vs curiosity, should have said the 496 is about what I’d expect with that combo (just have to look down the page at the 489 you posted).  The 511 seems to be an outlier, especially the torque. 

To be clear, I know the internet and social media is very fickle and “what have you done for me lately”, I appreciate all the info you guys publish. 

Some difference in cubes and compression, but otherwise id think this would be close to the 511 you just did.  That much difference in the Victor?? Hp/Tq peak RPMs are very close so I’d think cams are similar size

Holy hell, that’s a great build.  As stated, it’s not turning much rpm!!!  Torque is impressive, this thing runs with good 460 strokers with similar specs. TFS are great, obviously, but the ported ones really seem to take advantage of the cleaned up flow past the stockers stall point.   

What year Merc?  Imagine some type of scoop is needed for the Victor…

This was happening on a 500mi round trip, there were several stops for gas involved so I doubt it was an issue with fuel. 

Still haven't had time to mess with it, got the 352 on the run stand and started last night so that's taken priority.

Very rough oil filter adapter cleaned up and showing a light polished surface

Letting folks know Ive started vapor blasting parts and will be offering the service to forum members.  If you haven’t seen vapor blasted parts, the process can leave a burnished finish and doesn’t embed media into the base material.  Conversely, the media and blast pressure can be adjusted to provide a surface profile appropriate for powder coating or Cerakote.

Ran the Merc up to a car show in PA on Friday, 210mi run.  As I was driving, noticed it started surging at light cruise, such as following someone and just maintaining 45mph on secondary roads, anywhere from 1500-2500rpm.  Any bit of throttle and it would clean up.  Idles perfectly. 

I’m guessing carb is dirty and I’ll pull it apart and clean it, but just thinking through it.  Wouldn’t think it’s the idle feed as it idles fine. I’m thinking it’s something with the power valve as it happens at transition and cleans up with any drop of vacuum.  Main jet, I don’t think so as it was perfectly clean any time I was at light throttle like running 60mph and up.  I’ll also check for a vacuum leak.  Any other ideas?

Thought about timing as well but the on/off of the surge was immediate, no change in rpm at all was needed, just squeezing the throttle, so doesn’t seem like spark scatter

Well, it's certainly not cheap. 

https://www.hanlonmotorsports.com/product/tremec-short-input-kit-ford-tkx-p-n-hms-tckt18211/

That said, it's cheaper than a $1300 Quicktime bell.