Gonna start a sticky with tips and tricks to maximising power in the 73-86 460.
1. Timing set change; 72 and up have an 8* retard in the timing set stock. Install a 69-71 timing chain set (double roller is also a good upgrade).
2. Carb change; throw that 650 in the scrap pile and install a properly tuned list# 3310 carb
3. Getting rid of the EGR; (A) If your engine has the air injection tubing remove them and tap and install 1/4" pipe plugs in the heads. (B) On the Holley flanged intake remove the EGR spacer plate between the carb and intake purchase a new EGR to carb gasket and place directly onto the intake (this will be ~1/4" thick gasket) then install a 1" 4hole aluminum spacer then a standard holley gasket then the carb.
4. Tming; (A) replace a points distributor with a Duraspark unit that is recurved with a proper timing curve, (B) Set timing at 12* initial.
5. Both Crane and Harland Sharp offer roller rocker conversions; this is a great addition.
These are the methods I have devoloped over the years and will turn a lazy gas guzzling 460 into a lean tire frying beast with no major work.
Anyone who has other tips and tricks please feel free to share!
1. Timing set change; 72 and up have an 8* retard in the timing set stock. Install a 69-71 timing chain set (double roller is also a good upgrade).
2. Carb change; throw that 650 in the scrap pile and install a properly tuned list# 3310 carb
3. Getting rid of the EGR; (A) If your engine has the air injection tubing remove them and tap and install 1/4" pipe plugs in the heads. (B) On the Holley flanged intake remove the EGR spacer plate between the carb and intake purchase a new EGR to carb gasket and place directly onto the intake (this will be ~1/4" thick gasket) then install a 1" 4hole aluminum spacer then a standard holley gasket then the carb.
4. Tming; (A) replace a points distributor with a Duraspark unit that is recurved with a proper timing curve, (B) Set timing at 12* initial.
5. Both Crane and Harland Sharp offer roller rocker conversions; this is a great addition.
These are the methods I have devoloped over the years and will turn a lazy gas guzzling 460 into a lean tire frying beast with no major work.
Anyone who has other tips and tricks please feel free to share!