[CC Rider]

First year for tuned port was '85.

'85 and '86 all TPI's received the 700R4 MXO automatic.

"Rumor" has it some very late '86's got the L98 350 TPI.

But officially the L98 350 TPI came out in '87 and, throughout the remainder of the 3rd gen run, only came with an automatic.

'87 was the first year a 5 speed manual was available with the LB9 305 TPI and was available throughout the remainder of the 3rd gen run.

IIRC, a carb'd 305 was available up to early '88, then a throttle body injected 305 became standard, engine code E. Can't remember the RPO.