Here's a breakdown of your options and what to consider:
Best Option (But Most Difficult):
* Original 1970 Pontiac Catalina Convertible Seats: These are the ideal choice, providing a perfect fit and correct style. Your search will likely involve scouring classic car parts suppliers, online forums dedicated to Pontiac Catalinas, and even salvage yards. Be prepared to pay a premium for genuine, well-preserved seats.
Other Options (With Varying Degrees of Difficulty):
* Seats from other 1970 Pontiac models: Seats from other 1970 Pontiacs (like the Grand Prix, LeMans, or even a Tempest *might* be adaptable. However, there will almost certainly be differences in mounting points, seatback shape, and overall dimensions. You'll likely need some fabrication skills or a skilled upholstery shop to make them work.
* Seats from other GM A-body cars of the era: This is where things get trickier. While some GM A-body cars (like Chevelles, Oldsmobile Cutlasses, Buick Skylarks, etc.) share similar body platforms, the seat mounting points and dimensions might be significantly different. Extensive modification would almost certainly be necessary. This route is not recommended unless you have significant experience.
* Aftermarket Seats: You can find aftermarket replacement seats designed for classic cars. These seats usually come in various styles and sizes, but you'll need to carefully check their dimensions and mounting points to ensure they fit your Catalina's floor pan. You will likely need custom fabrication to mount them correctly.
Things to Consider:
* Frame vs. Upholstery: You might find frames that are closer to your original design, allowing you to reuse your existing upholstery or have it reupholstered.
* Seat Tracks: The seat tracks (the mechanisms that allow the seats to slide) are often a crucial point of compatibility. Finding tracks that match will significantly impact your success.
* Professional Upholstery: Even if you find compatible frames, you'll almost certainly need the help of an experienced automotive upholstery shop to handle the installation and, potentially, any modifications.
Recommendation:
Start your search by focusing on finding original or donor seats from other 1970 Pontiacs. This will give you the highest chance of a relatively straightforward installation. Prepare to invest time and potentially significant money in finding and adapting seats to fit your Catalina convertible. Documenting your car's original seat configuration (take lots of pictures!) will greatly assist in any replacement efforts.
