With a 94-96, you can use either a 75/25 or a 34/78. The difference in size is less than an inch in width and the battery tray in the L99 and the LT1 can accommodate either or. I don't know much about the TBI engines, the L03 (305 cubic inch) and the L05 (350 cubic inch) that 91-93 had. It may or may not fit. You'll have to measure the width of your battery tray.cuz i went to the website and it said 75/25 for a caprice