Identifying 400/351M
Mountain Pass
Joined: Sep 2000
Posts: 233
Likes: 0
From: Eagle River, Ak
Identifying 400/351M
Is there any way to easily tell these apart before I pull the engine from the truck?
The engine I am looking at ha a ridge on the edge of the flat area where distributor goes in.
Thanks,
The engine I am looking at ha a ridge on the edge of the flat area where distributor goes in.
Thanks,
Thread Starter
|
Posting Guru
Joined: Aug 1999
Posts: 1,485
Likes: 3
Identifying 400/351M
If you are 100% sure of the originality of the motor and the valve covers, the sticker on the drivers side cover will tell the ci displacement. If not, the only method is to check the crank stroke. 400= 4" 351= 3.5"
Nathan
Nathan
More Turbo
Joined: Dec 1999
Posts: 582
Likes: 5
From: New Orleans United States
Identifying 400/351M
The fastest way to tell is to take out a sparkplug, make sure the piston is at top dead center, and put a long pencil on the plug whole. Spin the engine till the piston bottoms out and measure on the pencil how far it traveled. As mentioned above, 3.5" = 351 and 4.0" = 400.
Thread
Thread Starter
Forum
Replies
Last Post
