There are lots of builds in this section of FABO. You should spend some time reading through several of them.
Do you already have an engine? There are differences between the truck and car version. You really need to provide more info. G3 and 67 cuda is pretty broad.
Holley makes mounts and other parts but it moves the engine forward 1-3/4" which leads to other issues.
I'm putting a 5.7 engine out of a wrecked 2014 Challenger using TTI mounts and headers into a 68 Barracuda. It fits nicely but right side frame rail required minor trimming. I'm using a factory 16:1 manual steering box. A factory PS box is too big to clear the exhaust. A Borgeson PS box will fit.
I'm using the stock style Tanksinc fuel tank and Corvette filter/regulator to keep it simple. Easy bolt in.
Then there's the cooling system.
Don't forget a transmission.
You'll have to choose an engine control system. Hotwire, Holley and the Mopar Performance kit are popular.
Whatever your budget is right now......double it.
