There may be an extra bolt, just to hold the flexplate to the tranny.
Also, you can pull the T converter out with the engine and unbolt it then if you want.
Just be sure to put it gently, back on the input shaft after you unbolt it from the flywheel.
This prevents too much leakage and dirt entrance in both the tranny and the converter.
An easy way to spin the flywheel while the engine is in us by turning the crank bolt (front).
Also, no matter which way you pull the engine out, with or without the converter, be sure it is fully seated on the output shaft before dropping the engine back into place.
If it isn't seated fully and kept that way during the engine install, then the converter will bind on its shaft and therefore the crankshaft and you will never get the enginge together with the tranny or the engine to turn over at all.
It will effectively lock the engine up.
Trust me.. my 351w gave me heck and had to be pulled twice just to keep the t converter seated enough to make it all fit right. It was an extreme 3 days of cursing and screaming just to get it back in and running.
/emoticons/
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(inexperienced crew on the cherry picker as well as someone thinking it was cool to run a saw on tree limbs right beside the truck during some of the install.
You WANT everyone up top to hear EVERYTHING you say about which way to go so the job goes smoothly and safely.. afterall, several hundred pounds of engine can **** you when someone isnt paying attention or misunderstands you due to outside noise.)