Well, the investment of the car is actually not bad, it's less than what stock cars in similar body conditions are going for. Ideally I could use the 727 Trans with an adapter to mate it up to the 2JZ, but I did some prelimiary research and it looks like they don't make them. I can probably have one made, but then again at the expense of time and $$$.
I like the fact that the 2JZ is fuel injected and litterally comes with everything that I need to run it. ECU, wiring harness, injectors, it has it all, even down to a 4 inch exahust. I understand that fabbing up some engine and transmission mounts are time and $$$ consuming, that's kind of why I posted this, to hash the idea out with others in a similar mind set.
Rebuilding the 304 is the cheapest route by a long shot.
-Complete engine gasket set - $120
-Minimal downtime
-Fabrication costs - $0
-Potential power 250-300 HP
Swapping in a more potent v8, let's say a 360? 440's also bolt up to the 727 Torqueflite, but I'm not sure if the Z can fit a big block.
-Engine - $?? Haven't found one local yet except for a fully built race 360 that the owner is asking 2k for.
-Medium downtime
-Fabrication costs - $100-200 for engine mounts if they are different
-Potential power - 300-600 HP depending on amount invested in Engine
2JZ-GTE swap
-Engine, Auto Transmission, ECU, wiring harness, intake and exhaust manifolds, stock twin turbos, 4" exhaust - $2200
- Longest downtime by far
-Fabrication costs - $1000?? I know I'd need a custom driveshaft, the rear end on the car should be OK, I'm not sure 100% of what it is, but the owner does know that it is an LSD (Positrack). Could be from a Jeep or AMC, that's what the motor is from. Will need motor and transmission mounts, upgraded fuel system and tank, plus more.
- Potential power - 300-450 HP using stock engine and transmission. Better drivability, plus dat turbo spool.
Pushing for more HP out of the stock 2JZ is fine, I could get 700-900 with a big single turbo and decent manifold, fuel delivery, and tune, but then I'd have to drop some serious bucks into the Aristo tranny to keep it alive too. I'd love to run the 727 with the 2JZ, then I'd only need to fab up engine mounts, the drive shaft and rear end would be done already, and the 727 can be rebuilt for pretty cheap to take a massive beating. I see that they offer adapters for GM transmissions, but no Mopar ones, so that would need to be custom too.