340 engine mount bracket

Hey all,
I'm upgrading from a 273 to a 340 in a 67 cuda. I'm dealing with the drivers side engine mount issue. I read that a 318 drivers side should work with additional spacers.
Does it matter what car the 318 bracket came off of? A, B, E, etc?
Ideally I'd like the right bracket but they seem too hard to find, even new.
I saw a bent one listed in the classified for 100 bucks, but I'd rather go for something a little more reasonable.
Thanks!