What parts can I use from a 73 140hp for a 69 120hp

[salvageyard saviour]

I got talked into taking an old Starcraft glass to the landfill and am stripping parts.
The 140 is seized and the oil pan was full of water.
As you can see from my username, I'm a packrat and can't have too many old Merc parts.
So,my question is, is it worth saving things like the carb(Rochester 2gc) exaust manifold, oil pan, drive coupler or throttle parts ?
Also, is this 140 unique enough to rebuild? ( I can't give serial numbers, the tag was bent under and pinched by the flywheel cover) It would be a hobby not a money maker. I've done many auto and marine engines before.

 

[Bondo]

Ayuh,..... Compare the parts, if they look similar, they'll probably swap over,......
'n, nope, nothin' to special with a scrap '73 3.0l motor,....

 

[salvageyard saviour]

Thanks for the reply. The intake/exaust manifold does look different but I don't have an old 120 laying around to compare the mounting holes or alignment of ports from engine.
I guess I'll get the 8 cents per pound for the block and head, I knew there's a 120 practically behind every barn, but this is the first 140 I've came across. Seen plenty of 165's also.

 

[Scott Danforth]

the 3.0 (181) is just a bored and stroked 2.5 (153)

nothing special about either of them. in fact, the 3.0 replaced the 2.5 in 1991 (yes, 31 years ago)