timing question

[hilandr452]

Hi folks,

Asked this question in my engine rebuild thread (71 GMC 3500 longhorn), but am getting no response. I have the initial timing set to 14 deg BTDC. It's been running pretty good but, difficult start after warm. I want to get it right. My driving range is 5000-6000 feet above sea level and manufacture setting is 8 deg BTDC so I added 6 degrees to set. This is what I've always thought was right. What do you guys think?

Engine is 454 from an 83 dually truck all smog crap removed and bored .030 over, flat top pistons installed. Cam is 292 int./302 exh. duration (advertised) with matching lifters and springs, edelbrock 7809 double roller timing set and edelbrock performer rpm manifold 7161 non-egr oval port. 1406 600 cfm edelbrock carb, oval port heads rebuilt from the original 402.

Thanks in advance,



-Dan