I've had a lot of experience w/ El C's, they're great. My uncle had a 68 that went 200k miles for him. A friend bought a 74, similar to the woody above. He cut the front 18" off of it (there is nothing useful there) and added a expanded metal grill w/ lights and a 4 x 3 metal channel bumper. He put some truck axle w/ a highway gear on the back and took an inch or 2 off the bed side of each wheel well so a 4' wide sheet of plywood would fit. What a great truck! Chevy should have made these changes. Get a 350 automatic. Practically in destructable, they made gillions of them, any garage can work on them and parts are everywhere.
About 20 years ago I looked at a 69 Super Sport. BONE STOCK it had a 396 w/ a highrise manifold, HUGE Holley carb and headers w/ dual exhaust, a four speed with Hurst shifter and bucket seats. That things would haul a**, couldn't stop or turn but yeehaw it would go. It was April 14th and cost exactly what I owed Uncle Sam. Paid my taxes instead of buying it and have regretted it ever since.
They are way cool.