I have done this before without removing the exhaust. It's been some years now... but if I recall, I put a floor jack with a 2x4 spanning the oil pan. Lift the jack until it just gets the weight. Pull the long bolts that hold the mounts to the k-member, as well as the bolts to the block. Lift the jack up as high as possible. You will need to watch the back of the intake to cowl panel, and the trans to tunnel clearances to not break anything. After that, it's just figuring out a way to get them out of the hole. It can be done.
1994 Thunderbird - 2000 4.2L M5R2 now has 55k
1995 Thunderbird - 2002 Alum 4.6L SVO - Awaiting transplant...
1996 Cougar - 2004 3.9L 4R70W