Nice 67 Camaro, do you have your heart set on the 283 to keep it original or would you swap it . You could always store the 283 and build something . 302,327,350 maybe? the selection of part's for a smallblock chevy is staggering. If you stick with the 283 at least put some solid part's into it . Make a plan on what you want to do . H.P. and torque .Once you decide then buy part's. In my motor's I alway's have a solid valvetrain. Screw in stud and guide plate's are excellent . Crane Cam's are my choice they have a very wide selection .Match your cam with gear's, torque converter etc. Headers are a must for any smallblock chevy. I also like 2.02 intake valves and 1.6 exhaust .Manley is my choice. roller rocker's are also good I like Harland Sharp 1.6 or Crane. Good luck on the motor for the 67.