So, I decided to build a new engine for the ’78. I wanted a little bit more HP then the stock L82 was providing. I also felt that the heads in the stock engine were wore out.

Here are the specifications:

Block:   GM Casting 3956618  (From 1969 C10-35)
Bored 4.030 Align Honed, Decked, Pressure Tested
Crank:  Scat Cast Steel   Part# 9-10442
Pistons: Claimer Hyper-eutectic Flat Top
Cam:  CompCam XE268H-10
Heads: Dart Iron Eagle 180 64cc
Rockers: CompCams Magnum Steel Roller Rockers 1.52
Intake: Edelbrock Performer EPS Intake (2701)
Exhaust: Patriot Headers (PTE H8025-1)

Compression ratio: 10.45:1
Dynamic Compression: 8.7:1
Cranking Pressure: 194.98psi
Guage Pressure: 180.44
Dynamic Cranking Pressure: 176.46psi
HP: Estimated 401 @ 5500
Torque: Estimated 442 @ 3800

The block was bored and machined at Brazier Race and Machine in Winnipeg, Manitoba. They were very good, and did a great job on my block. They talked me into getting them to install the crank, cam, and pistons which was probably a good idea.

I painted it right away.

Then installed the Oil pump, heads, rockers, intake & water pump.