revted47, I encountered problems with the Spanish Grain seat covers for my '50 3100. I carried the covers and seat/back assembly to a local upholstery shop (25+ years service time) to have them installed professionally. The seat cushion cover went on slick as anything. The problem came when he tried to install the seatback cover. When he slipped it on the springs, the upper corners had way too much material. No manner of stretching or pulling would make them fit. After two or three calls to JC and talking to Jim, we all came to realize that the cover was cut with too square a corner for the upper corners of the seatback. All the covers they had were cut to the same shape. We ended up shipping the seatback cover back to JC and buying 3 yards of Spanish Grain yard goods so the shop could make a cover on-site. Luckily, the OEM seatback cover was in good enough shape to use as a pattern. By the way, if you go this route, you will have almost 1 yard of material left over.
