Ernest,

  I could not tell from photos you posted what front housing your

13B has. Unless you  eng. is a mix and match of parts one way to

tell 1984-85 from 1986-up is the front cover. The 1984-85 cover has

four studs for eng. mount in it. The 1986-up cover has no studs or

threaded holes for them.

-------------- Original message from echristley@nc.rr.com: --------------

> The Haynes repair manual seems to come in two
> flavors. 1985 and before, vs 1986 and after.
>
> Problem is, I don't really know which category this
> engine falls into. It's a 6-port, NA (has the
> exhaust splitters). But how do you tell beyond
> that, and does it really matter which book you have
> if you're just starting with little more than the
> engine block?