BIG BLOCK V-8 CAMSHAFT 385 SERIES (429/460)

M-6250-A443*
• Substantial horsepower increase at high RPM. Production cylinder heads require machining of valve spring seats to prevent “coil bind” with stock length valves. ⁽¹⁾

M-6250-A460*
• Increased horsepower and torque. Good all around performance. Widely used in marine applications. ⁽¹⁾

M-6250-C460*
• Excellent torque and horsepower. Same as used in our 460 crate motor M-6007-C460. ⁽¹⁾

M-6250-A514*
• Includes roller tappets used in M-6007-A514/B514/C514/D514 ⁽¹⁾

PART NUMBER	ENGINE	DESCRIPTION	PEAK RPM		DURATION (2)		VALVE LIFT
			TORQUE	BHP.	INT.	EXH.	INT.	EXH.
M-6250-A443*	429/460 Wedge	Hydraulic Flat Tappet	3000	5000	300°	310°	0.562"	0.588"
					234°	244°
M-6250-A460*	429/460 Wedge	Hydraulic Flat Tappet	3250	4750	288°	292°	0.493"	0.502"
					216°	220°
M-6250-C460*	429/460 Wedge	Hydraulic Flat Tappet	4750	6000	310°	320°	0.588"	0.614"
					244°	254°
M-6250-A514* (3)	514	Mechanical Roller	4750	6250	304°	308°	0.647"	0.647"
					254°	258°

NOTES: ⁽¹⁾ Compared to standard production camshaft with production cylinder heads and intake manifold. ⁽²⁾ Duration figures in shaded area at 0.050" lobe lift. ⁽³⁾ Not compatible with roller cam bearings.
NOTE: On EFI engines, performance camshafts work only with mass air induction systems. See pages 100-101.