I think that the later yeared... somethin like 1991+ TBI cylinder heads... are
the same as the previous turbo's and are suitable for forced induction
applications. In the 80's the valves were cast with a "T" in them supposively
for "Turbo". It seems all the later TBI's have that. I've seen th
The later castings are all the same. The turbos get different valves to
handle the heat, but any of the heads with the same casting number are a
direct bolt in. Just make sure to look out for the letters "OSJ" stamped
into the head. It means the factory bored out the cam journals oversize. As
long
1) Nope.
2) Yep.
For clarification: The differences between the turbo and non-turbo
heads are somewhat minimal in the grand scheme of things. The valves
are stronger. The chambers are shaped a little differently. The valve
springs are stiffer and the cam is different. Nothing that would
prev
