The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Initial timing specs for 1975 400 small block

leftybass209 · 06-07-2017, 09:48 PM

Is that 400 bone stock, or do you suspect the cam has been changed? If the cam were changed, you will most likely need to play with the timing a bit.

Try to find a chassis manual for the 75 trucks.

06-07-2017, 09:48 PM	#2
leftybass209 Registered User Join Date: Feb 2011 Location: Modesto, CA Posts: 2,189	Re: Initial timing specs for 1975 400 small block Is that 400 bone stock, or do you suspect the cam has been changed? If the cam were changed, you will most likely need to play with the timing a bit. Try to find a chassis manual for the 75 trucks.