Good find! To make the 4-speed (Borg Warner T-10) fit, you will need to shorten the front section of the driveshaft. You will also need to modify the front floor pan (sometimes called the hump) to accommodate the 4-speed and shifter. Finding the cross member to support the rear of the 4-speed shouldn’t be too big a job. Someone on this site should be able to help you. Have fun, Good Luck!