273 Engine intake upgrade turned sour

Just a gut reaction on my part.
From what I think I understand, you just want to get the 273 going again for a few seasons until you can afford to build your 360.
Do you already have the 360, and just waiting for the funds to build it? If so, this would be my plan of attack:
Yank the cam, lifters, pushrods, and rockers/shafts out of the 360 (keep everything in order- label all lifters as to exactly where their location was) and transfer it all to the 273. The 360 cam, if a 2bbl., is fairly comparable to the 273 4 bbl. cam (410/412 vs. 415/425 lift, 252/256 vs. 248 duration), if a 4 bbl. 360 cam it specs at 430/444 and 268/276- a nice little increase. It all drops right into the 273. Since you will be trashcanning the cam and lifters anyways when you rebuild the 360, why not make use of it now? Save the money for your 360 parts. Repurpose the 273 adjustable rockers (and pushrods?) for your 360 build. Add a decent double roller chainset and button 'er up, easy peasy; and money left over for the future build.
JMO.