The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - My 1968 C-20 Golden Anniversary Project

GerhardH · 06-29-2020, 01:56 PM

So a little bit work on the heads. They are already resurfaced, because of concavity. In the outer area 0.3 mm (0.011811") removed. Have collected some pictures especially for beginners to imagine.

Cylinder heads 3991492 ( Inlet valve diameter 2.02 inch /Outlet valve diameter 1.60 inch & screw- in rocker arms, straight plug,complete, GM 3987376)

Casting date L96
9 = 9.
L= Dezember
6 = 1964,1974
Chevrolet teased the aftermarket in the mid-to-late ‘70s, first with over-the-counter service replacements like the 3991492 head

06-29-2020, 01:56 PM	#59
GerhardH Registered User Join Date: Aug 2017 Location: South Germany Posts: 527	Re: My 1968 C-20 Golden Anniversary Project So a little bit work on the heads. They are already resurfaced, because of concavity. In the outer area 0.3 mm (0.011811") removed. Have collected some pictures especially for beginners to imagine. Cylinder heads 3991492 ( Inlet valve diameter 2.02 inch /Outlet valve diameter 1.60 inch & screw- in rocker arms, straight plug,complete, GM 3987376) Casting date L96 9 = 9. L= Dezember 6 = 1964,1974 Chevrolet teased the aftermarket in the mid-to-late ‘70s, first with over-the-counter service replacements like the 3991492 head Attached Images __________________ Best regards GerhardH! Members met: 68 short step, 68bowtie, 72c20customcamper, botmfedr1, C/10 King, Chevyland, cornerstore, dmjlambert, fun in dirt, GMan69, Ol Blue K20 1968 CHEVROLET C20 Custom Camper 50th Anniversary, Long bed (LB) 8', 327 V8, Air Condition (AC), Power Steering (PS), Power Brake (PB), Z62 Custom & Comfort Appearance, Turbo Hydramatic TH 400 http://67-72chevytrucks.com/vboard/s...d.php?t=760400 Last edited by GerhardH; 07-01-2020 at 12:01 PM.