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RotaryRocketeer · 06-08-2018, 12:41 PM

1976 GMC (the truck in my profile photo.)
350 w/Vortec 062 heads
Unknown towing/RV cam
Auto trans with stock stall
Edelbrock 1406 (previously a 1407, but it's off for a rebuild/refresh)
Performer RPM intake
Unknown brand longtube headers
2.5" dual exhaust
DUI cap, rotor, module, and coil
Brand new plug wires that ohm out fine
Delco plugs with .055 gap
Initial timing 18 deg
Full manifold vac advance
15" vacuum at idle with advance unplugged and capped
Idle in gear: 600-650
Always running 91 octane, due to chamber volume on the 062s.
Adding a wideband is on my to-do list

Owned the truck for over a year and it sees daily use most of the time, so it isn't like I'm setting up something totally new. Has run very well over period of ownership.

06-08-2018, 12:41 PM	#3
RotaryRocketeer Registered User Join Date: Jul 2017 Location: OKC, OK Posts: 247	Re: Timing Curve Advice 1976 GMC (the truck in my profile photo.) 350 w/Vortec 062 heads Unknown towing/RV cam Auto trans with stock stall Edelbrock 1406 (previously a 1407, but it's off for a rebuild/refresh) Performer RPM intake Unknown brand longtube headers 2.5" dual exhaust DUI cap, rotor, module, and coil Brand new plug wires that ohm out fine Delco plugs with .055 gap Initial timing 18 deg Full manifold vac advance 15" vacuum at idle with advance unplugged and capped Idle in gear: 600-650 Always running 91 octane, due to chamber volume on the 062s. Adding a wideband is on my to-do list Owned the truck for over a year and it sees daily use most of the time, so it isn't like I'm setting up something totally new. Has run very well over period of ownership. Last edited by RotaryRocketeer; 06-08-2018 at 02:46 PM.