Hi first time posting i have inherited a 2005 harley davidson superglide fxdx (project) the engine has been been replaced and I unsure what size it is any help greatly appreciated.
I've attached photos
Im also looking to install a digital dash as i have installed t bars and have no where to mount gauges any recommendations on what would be a good replacement
Thanks for your time

 

GJ = FXDX - V = Twin Cam 88 Carb - X = 1999 ... the numbers should be sequence numbers

 

Engine has been replaced and the heads are Screaming Eagle so the VIN may not be the best indicator of engine displacement.

 

If the entire top end has been done with those SE heads you may still be at the stock 88", or have big bore cylinders (95" perhaps?), or an overbore on the original juggs. Even though the cases have the stock numbers they could have been worked to accept a bigger stroke/displacement. If you don't have any information from the previous owner sometimes the only way to know exactly what you have is to open it up.

 

Assuming FreedomRider is correct (I have no reason to believe he's not) it at least started out as an 88". That wouldn't have come stock with SE heads, but there's no reason you can't install SE heads on an otherwise stock motor. Not likely though.

My guess is it's probably a 95" now with upgraded cams, but there's no way to know for sure (that I'm aware of) without some disassembly.

 

Inexpensive borescope cameras are available, you could pull the plugs and see if there are any identifying marks on the pistons. While looking at stuff, you could use a straw to get a rough measurement of the stroke- 4" travel is an 88 flywheel, 4.375 is a 103.
A popular combo for that era was a "Hippo" build (RIP Frank) - SE heads on a 95" big bore kit with flat tops @ 10:1 and an S&S 570 cam.