Presume you know this, but the Parisienne was based on the Chevrolet chassis, so 5" shorter wheelbase than the US Pontiacs. The Revell '65 or '66 Impalas would be ideal donors for the chassis, but both have big blocks, so you'd have to swap in a 327 from another kit.
I would think any resin bodies would be 1:25 to go with available kits, rather than 1:24? Your '67 Bonneville is almost certainly a resin repop of the original MPC kit, which was reworked for each annual release.