Well I just want you to be prepared ...
Holley is definitely not plug and play or "easily" made to work.
I don`t see anything that can be reused wiring or harness wise on a 496 to work with Holley. Maybe some sensors but you`d have to know what voltage/ohms they are and set up tables. That entire wiring harness will have to go.
Then you`ll need a tune from scratch..
Took me a whole summer to wire up my last engines
If you`re doing the wiring I suggest blowing up the shematics , makes life easier .

CTS , coolant sensor set up if not one in the drop down
https://cimg7.ibsrv.net/gimg/www.off...d9d8cb4ad0.jpg
https://cimg8.ibsrv.net/gimg/www.off...5128a492ed.jpg



https://cimg0.ibsrv.net/gimg/www.off...db8018b780.jpg

Dan,

I'll definitely hang on to those. Not sure if there's a difference, but we are using the HP unit. Supposedly, it's got assignable inputs for everything. We'll see. I'm also getting the harness along with the ECM.

The builder says he's got this. It's definitely not in my wheelhouse. I'm not letting go of my PCM555 until we get it all rolling. If it doesn't work out, I'll send the 555 off to Boos and live with it.

Thanks. Brad.

https://cimg4.ibsrv.net/gimg/www.off...4a2387d06.jpeg
https://cimg7.ibsrv.net/gimg/www.off...6baf7903a.jpeg
https://cimg9.ibsrv.net/gimg/www.off...3c0afe21d.jpeg
https://cimg1.ibsrv.net/gimg/www.off...c1c02d661.jpeg
https://cimg2.ibsrv.net/gimg/www.off...365f5ba1e.jpeg
https://cimg3.ibsrv.net/gimg/www.off...db6385042.jpeg
https://cimg4.ibsrv.net/gimg/www.off...07d763815.jpeg
https://cimg5.ibsrv.net/gimg/www.off...a7c9eedce.jpeg

Looks like we’re off to the races.

Thanks. Brad.

Plenty of room to work on the cold air intake that you talked about before.

Wildman,

Yup. That's among many issues I intend to address while it's out. If we recall, the bilge pump had taken a sh!t, and was proving to be a PITA to get to, so THAT'S the first thing I'm gonna do after getting the bilge cleaned up. The charging seemed to be dropping off the same weekend of the piston failure (projecting some really weird electrical anomalies that were indicative of a dying battery/alternator), so I'll at least be getting the alternator tested; most likely replace it. The batteries are both good, according to the charger. Also gonna try and convince the CFO the SilentChoice was a significant contributor to the failure and ditch it while it is out. If I can, I'll be making some riser/angle blocks for the exhaust risers, as well as modifying/extending the riser tips, which will significantly reduce the potential for reversion. This will open up some cam options. The ProCharger crank pulley was another hangup getting the engine out, along with the long output snout on the drive end, but I don't know if there's anything we can do about it. Getting rid of the wye-pipe for the SilentChoice will go a long way to making it easier to shoehorn back in. It was a serious thorn in our side getting it out. It's a REALLY tight fit in there.

Thanks. Brad.

LOL I have twins in a 32, I know.:drink:

https://cimg1.ibsrv.net/gimg/www.off...48c126e0d.jpeg

Wildman,

https://cimg3.ibsrv.net/gimg/www.off...7813a65eb.jpeg
https://cimg5.ibsrv.net/gimg/www.off...209539786.jpeg

The Procharger crank pulley is under the lip of the rear seat and the “long” output snout was under the steering rack, as I’m sure you’re aware. Front to back, we had almost ZERO clearance. At first we thought we’d be able to rotate it to get it out. Nope. It was like trying to rotate a square inside another square. :(

Thanks. Brad.

god i love my triple for engine room work !!!

I have the same issue with my blower pulleys under the angled rear seat/front fire wall. Pretty rough access. Had to angle the engine/tranny up 45° to get it to clear without yanking the trans.

Glad you're on the path to getting it back on the water.

Tartilla,

Got a look inside today:

https://cimg9.ibsrv.net/gimg/www.off...fe9264559.jpeg
https://cimg0.ibsrv.net/gimg/www.off...f9ebf2c84.jpeg

We can clearly see where the piston was trying to pulverize the bits of piston and ring. Looks like the head gasket gave out, too. Not sure if it happened before or after the piston failure. Valves look OK.

Got the rods ordered yesterday. Gonna order the pistons in the morning and sending them to SwainTech for the top coating.

Block will hopefully go to the machine shop in the next couple days. Getting decked, both block and heads. Going .030” over on the bores.

Also looks like the SilentChoice is ditched. Anybody want it?

Thanks. Brad.