I got my hands on a '98 Buick Regal 3800SC.

Back story to this engine: P.O lost his keys, ripped the column apart trying to start it. Sold it to a junker a few years back and it sat covered since then.

I was quoted $650 for the entire front cradle, axles, ecm, harness, ect. They're going to cut the harness at certain points.
The motor has supposedly 109K on it, and by sight it was looking good, all the pulleys turned, ect.

-I need to go back to put a deposit on it, but what transmission did the 1998 Buick Regal GS have?
-Would it be a good idea for them to cut the harness by the radiator?
-Since the P.O ruined the column trying to start the car, would I run into an issue with this in the ECM?

I'm buying the engine/trans and all now, rebuilding over the summer and within August I plan to have it in the car.

Hmm that story sounds fishy considering you can simply go have a key made up with the VIN if you are a legitimate owner.. Also w-body ignitions are extremely easy to bypass completely, especially a 98 which probably doesn't have pass key. And who really junks a 109k mile car because of a key? Red flag.

They should only have to cut parts of the harness that connect to the car or fuse box, there is no reason to cut other parts of it to get it out.

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86 Fiero GT 4spd - L67 swap: VS cam, GenV
98 GTP - Some mods

How could I get it started? Or at least turning over.

sco you assume everyone just knows this about these cars..
If it were me, i'd pull the plugs and check them out.. and do a compression test... if they check out go for it.