Remove and install new transmission 904 auto

Do like greg said and spray paint 1 flex plate ear while hooked to converter. Also, put engine on TDC because you will be turning engine to get the torque converter bolts outs. I realize our 318,340, and 360's are either in or 180 degrees out, but if it makes it easier. Mark where the distributor sits on the block also- that way the timing is about dead on. Need to take the oil pressure sending unit out also to get to a bellhousing bolt.
I literally just did this- twice- in the last 3 weeks and finished the second time today- dumb me didnt change the front pump seal the first time. A $6 seal-REPLACE IT!!
I used the car jack to lift the front end up to get the trans out- looked like it was popping a wheelie lol. I first undid the driveshaft, then inspection plate and TQ conv bolts. Then passing gear linkage at bell housing then linkage at z-bar-take zbar off and let hang-only need to disconnect linkage from tranny side but at the zbar.
I actually raised the tranny side up to get at the top bolts on bell housing-didnt have enough extensions, universals, and short socket to reach. So wrenched the top 4 at a 1/4 turn at a time-fun lol.
I have headers-hedman??-so I had to disconnect the inner tie rod on drivers side and also disconnect pitman and that other are??lol and slide drag link out from headers just to get the starter out. Dont forget to disconnect nuetral safety switch harness either at top of firewall or down by switch. I did both so it wouldnt get tangled up somewhere or pinched between bell housing and block on reassembly.
Dont forget the threadlock goo for TQ conv bolts-red or blue, up to you.
The rest you prob know lol. Hope this helped. I cant think of any other tips off hand that hasnt been mentioned here or by others.
Def make sure converter is ALL the way in before installing. Should be about 1/2 inch?? inside the bellhousing-not flush with it. Have rags and oil dry. And maybe beer haha. and earplugs for the kids because of some words you may make up. Good luck. Not too bad of a job, just take your time and if you get too stressed-walk away for 10 min.