I have a '65 Pickup with a 292 and an S-10 5 speed in it. It will fit into the cast iron bellhousing you are using on your truck. Shifter clears the seat.....will have to change clutch disc. If you change the spindles on your truck (disc from 1972 to 1987)will fit but you MUST use the corresponding ball joints for the year of the spindles you are using. These guys are good on truck parts
http://www.earlyclassic.com/home.aspx They also make dropped spindles to fit on your original suspension. You will love the 5 speed behind the 292. I also installed HEI, aluminum intake, headers and a Holley-Weber 2 BBL from Tom Langdon. Keep us posted