Mounyain/Northern Chassis suitable for 3 printed shell

[Dreyfusshudson]

Bachmann's J1:We can purchase it just over $100. Although its wheel is small...
BLI's Reading T1:We have more cheaper Class J.

Bachmann's Heavy/Light Mountains:Trying to modify them to Mohawk.
BLI's PRR M1:Little bit expensive, but they can represent 1800mm wheels.

Bachmann' 4-8-4:Very cheap. It is based on ATSF 4-8-4, Its wheel would be over 2000mm. But I heard that Recent model's wheels are more smaller, maybe it could be suitable for 1900mm wheels.

Kato's GS4/FEF:Cheap but very reliable. If you use Yahoo Auction, you can bid it around ￥15000.
Con Cor's 4-8-4:Not so cheap, and scarce. Kato is more better option.

Extend 4-6-2's wheel:Is it Possible? Milling down and attaching its diecast block would be horrible.

[kiwi_al]

Bachmanns J 4-8-4 is 69 inches wheel diameter
Bachmann 4-8-4 all versions 74 inches wheel diameter Later version in the clear crystal case is the only one to get, the rest aren't good - also cheap is in the eye of the beholder
Kato FEF 3 Works out to 78 inches wheel diameter and is not cheap
Kato GS4 same wheelsets and a little cheaper
Please note wheel diameter is the measurement across the treads and not the flange

[Dreyfusshudson]

Bachmanns J 4-8-4 is 69 inches wheel diameter
Bachmann 4-8-4 all versions 74 inches wheel diameter Later version in the clear crystal case is the only one to get, the rest aren't good - also cheap is in the eye of the beholder
Kato FEF 3 Works out to 78 inches wheel diameter and is not cheap
Kato GS4 same wheelsets and a little cheaper
Please note wheel diameter is the measurement across the treads and not the flange

Well, Bachmann's 4-8-4 could be nice base for C&O Greenbrier!

[Dreyfusshudson]

I have old Bachmann's 4-8-4(1970s Tomy nine scale). I remember its wheel diameter is almost same with FEF.
Maybe newer version have smaller wheels.

[Pizzaparty]

What are you wanting to do is a better question