Classic/Antique Car Repair: Heads, chevrolet truck, 383 stroker

Question
I have a 65 El Camino (First Car) that I've owned since 1992. The previous owner took out the 283 an installed a 350 from a 1972 Chevrolet Truck. He modified the 350 to give it more power with: Bigger intake, and a higher lift cam. I have no idea how big the cam is, but we had to put in bigger springs because I kept breaking them. The heads are 3998993 1.94/1.50 heads with the big 75cc chambers. Pretty much a low performance truck head. I can purchase a set of used double hump heads that a guy just took off his nova for about 200 bucks (He's going to a 383 stroker) Casting #3917291 64cc 1.94 1.50.....I only want to get these if I can simply have someone remove mine and install the others.  I've never had this done, so I was wondering if this is an easy swap, or am I opening a can of worms that will cost me big bucks.I greatly appreciate any insight you might give

Answer
Hello John,

Yes, the double hump heads should be an easy swap but you do need to rebuild them if you haven't done so already. In particular, you will need to replace the valve springs as you did on your existing engine.

Sounds to me like you're way overcammed for the application, too. While you've got everything apart, consider putting in another cam matched to the new head/carb./intake combo. as well as your performance expectations (torque, high rpm power, mid-range, etc.) Many of the major cam manufacturers provide applications assistance for this.

Match the cam to the heads and I think you'll be amazed how that engine wakes up!

Bob