Can I make a 103 top end fit on a 80 ci bottom?

 

Great first post. Just making sure I understand the question, you're asking can you put a 103"Twin Cam top end on a 80" Evo??

 

My bad, it’s an 88 twin cam

 

Well now it's clear as mud

 

Ok, I have a 06 flh Electra glide with a 88 tc motor. I’m wondering if a 103” tc top end will fit. I’m aware I’ll may have to bore it to fit the jugs, maybe change the wheels and cam chest too, but can it work?

 

I'm out...

 

88" engine has 4" stroke flywheels and a 3.75" bore. The 103 has 4.375 stroke flywheels and a 3.875" bore. Since the factory case bore is the same, you can fit 103 cylinders on your cases, but will need pistons designed for the larger bore, and the smaller stroke. This will make your engine a 95" (4" stroke x 3.875" bore).
The heads are interchangeable, you just have to use 2006 and newer intake flanges with 2006 and newer heads.

 

What about the wheels, he asked?

 

Can I use a larger stroke flywheels ?

 

just put a big bore/big stroke S&S engine in it

88 to 95 is easy, everything else is going to require a lot of parts and lots of machine work