LoL.... I'll admit I do have a soft spot for a few 'Grandpa' stereotype cars--late model Lincoln Town Cars, Crown Vics, Grand Marquis and Caddy DTSes specifically. They are old school in size yet modern enough to make great daily drivers, IMO.
As far as the custom Olds kit, sounds like there are enough new parts to warrant picking up one. I have one of the first issue stock versions, thought about getting the MCM hardtop resin conversion and doing one that way.
Edit: stopped at the LHS after work this afternoon and picked up this kit...the new parts look pretty nice at first glance.