1968 Road Runner '383' vs. 1968 Chevelle 'SS 396'

duster360 said

I hate to get away from the engine you are specifying but I wonder what the spring pressure are for the 375 hp engine. I have always heard that the 396 was bad about dropping valves.

Click to expand...

Here It Is

383/335 HP 'H-Code'
* Valve Closed ... #98 lbs. to #112 lbs. {#105 lbs.}
* Valve Open ..... #226 lbs. to #242 lbs. {#234 lbs.}

396/325 HP 'L-35'
* Valve Closed ... #84 lbs. to #96 lbs. {#90 lbs.}
* Valve Open ..... #210 lbs. to #230 lbs. {#220 lbs.}

396/350 HP 'L-34'
* Valve Closed ... #94 lbs. to #106 lbs. {#100 lbs.}
* Valve Open ..... #303 lbs. to #327 lbs. {#315 lbs.}

396/375 HP 'L-78'
* Valve Closed ... #94 lbs. to #106 lbs. {#100 lbs.}
* Valve Open ..... #303 lbs. to #327 lbs. {#315 lbs.}