Hi, guys!

I am absolutely sure this has been covered here...but can't find a complete instructional. Im going for a look on this bike that won't go very far from home...not on 1.8gal anyway...pic attached.

Project Bile: 1982 Shovelhead, FXWG
Existing Mods: Belt Drive Dry Primary
Planned Mod in Question: Install a tire that is much bigger than stock. 185mm wide and 30" OD (stock is about 26")

Issues I need options / solutions for:
NOTE: I love jokes but "a tire that fits" isn't what I'm looking for here.

1. Swingarm too short. Needs to be 2-3" longer to accommodate. Lengthen or is there a bolt on, longer one available?
2. Loss of Torque: Need to adjust sprocket setup to gain back torque / proper gearing. Current setup below:

• 23T Drive
• 49T Driven w/ .25" offset

Potential solutions:

• OEM 21T Drive (20T might be better if it exists) paired with OEM 49T Driven?
• keep current 23T Drive and pair to custom 56T Driven?

3. Chain clearance around tire:

• drive sprocket - needs additional .5" offset
• driven sprocket needs additional .5" offset / spacer.
• starter...how to address?
• primary...how to address?
• crankshaft...how to address?

Links to a how-to (for my vintage) would be great! Thanks guys!