cylinder head redesign

Reply Subscribe

Thread Tools

Search this Thread

Sep 25, 2000 | 10:37 PM

bigdaddy

Thread Starter

Junior Member

Joined: Sep 2000

Posts: 20

Likes: 0

From: magnolia, tx. usa

cylinder head redesign

What year did GM change the head angle where the stock old intakes will not fit without modification? Was it with the 87 tune port?

Sep 26, 2000 | 07:56 AM

kevinc

Supreme Member

Joined: May 2000

Posts: 2,963

Likes: 3

Car: 1982 Z28

Engine: LS1

Transmission: T56

Yup, 1987 was the year. It included changing from perimeter to center valve cover bolt location as well as the two center intake manifold bolt angles to 72deg.

Beware...'Vette heads are a hybrid design. Center-bolt valve covers, 90deg intake bolt holes.

-Kevin

------------------
1982 Z-28

See http://www.mycar.net/mafb/registry/detail.cfm?id=276 for details