I've had a Thunderbird LT.... probably the worst mechanical issues I've experienced these last two decades....badly machined pistons and liners...awful rattle on acceleration...sod off response from dealer...top end eventually rebuilt and sold quick.
Never again will I consider a Thunderbird for those reasons.
But others may have had different experiences.
Once bitten, etc...
Which is why I'm back on a TBA...I've got a 500 mile trip day after tomorrow...I know it'll do the job...and I'll enjoy the ride...
Trouble is, right now it's threatening to snow!
So what.