For one thing a 2.9 has a distributer, a 4.0 dosen't. The ignition system is PCM and EDIS controlled, so the 4.0 will reqire a different PCM and wiring harness to run it. I have no idea what implications there will be with the transmission, since the transmission on the 4.0 will be PCM controlled and the 2.9 is likely non-electronic. You may find that you will have to transfer absolutely everything, PCM, EDIS sytem, wiring harnesses, transmission, and everything to make it work right.
Sport Ranger ended on 2006-11-29.
July 29, 1989 was a Saturday.
December 29, 1989 was a Friday.
March 29, 1989 was a Wednesday.
Today - 1952 - 1989-03-29 was released on: USA: 29 March 1989
Today - 1952 - 1989-06-29 was released on: USA: 29 June 1989
The Home Show - 1988 - 1989-03-29 was released on: USA:29 March 1989
Another World - 1964 1989-09-29 was released on: USA: 29 September 1989
Wheel of Fortune - 1975 1989-08-29 was released on: USA: 29 August 1989
Later with Bob Costas - 1988 1989-03-29 was released on: USA: 29 March 1989
Later with Bob Costas - 1988 1989-05-29 was released on: USA: 29 May 1989
Siskel and Ebert and the Movies - 1986 1989-04-29 was released on: USA: 29 April 1989