NASCAR Whelen Modifieds... what are the differences between chassis?

[SupBro24]

I've been looking into the modifieds lately and see different chassis listed. LFR, Troyer, Cavalier, etc. To the untrained eye they all look pretty much the same to me. So what are the differences? Is one for a specific engine type or does it matter at all? I know nothing about these cars but would like to know more.

 

[AndyMarquisLive]

They're all bad to the bone and Tour Modifieds are the baddest cars on asphalt.

 

[Greg]

I've been looking into the modifieds lately and see different chassis listed. LFR, Troyer, Cavalier, etc. To the untrained eye they all look pretty much the same to me. So what are the differences? Is one for a specific engine type or does it matter at all? I know nothing about these cars but would like to know more.

NASCAR Whelen Modified Tour - Wikipedia

en.m.wikipedia.org