The 1970 Satellite convertible was available with everything from a slant six to the 383 4bbl. (no 440 and no Hemi available). Big blocks would be rare though.
In 1970, the Only B-body Plymouth convertibles were Satellites and Road Runners. The GTX and Sport Satellite convertibles were discontinued after the 69 model year. In 69 the convertible was available as a Satellite, Sport Satellite, Road Runner, and GTX. A 69 B-body Plymouth convertible is rare, but not as rare as a 70 convertible.
The Sport Satellite in 1970 was available as a 2 door hardtop, 4 door sedan and faux woody wagon. The Satellite was a bench seat model, the Sport Satellite came standard with bucket seats. The Satellite shared the vertical bar grille with the Road Runner though the tail panel between the tail lights was painted silver on the Satellite, and the tail lights didn't have the horizontal split in them. The Sport Satellite had the honeycomb grille like the GTX and the tail lights were split horizontally like those on the GTX, Road Runner and Superbird. The Sport Satellite also had the rear trim panel painted silver between the tail lights. The Satellite had a full length body molding near the very top of the fender line, while the Sport Satellite had very little side trim other than wheel lip moldings and maybe rocker moldings. Maybe they made some 1970 Sport Satellite convertibles for the export market, but I've never seen any mention of a Sport Satellite convertible in 1970.
