[Syty] Roller Rockers...

[Dave Goodhue]

>What model/brand?

>I think 3.8L Buick (LC2 engine) uses the same valve gear as the Chevy
350 and the 4.3L >Vortec uses Chevy 305 gear... or is it the other way
around?

The Buick LC2 has shaft mounted rockers.   The 4.3 is similliar to the
305/350  (305 is just a small bore 350)  The 4.3 is basically a 3/4
350, sharing the same bore and stoke.  (Tidbit of info, the 229 V6
Chevy is an 3/4 oddfire 305.)

Anyway I used a Crane Gold narrow body rockers and they worked just
fine, clear the valve covers fine.  As for Vortecs, typically the
lower intake needs to be modifed (extended to cover the longer ports)
and the heads will need to be redilled as the intake bolts have a
different pattern.  Vortec also have metric screw in studs, while most
SBC aftermarket rocker are based on english threads.  The easiest
solution is have the head redrilled and tapped for the english thread,
so you can use common SBC studs and rockers.