There is lots on info out there on doing a big block swap. Bascially you will need to notch the frame for the oil pump, i think you have to move some motor mounts, custom pipe and can. It is alot more work to put a big block in the IQr than a small block which is why you see alot of people going with the 600s
Option 1) Power Addiction motor plate, notch PTO bulkhead to clear cases, notch MAG bulkhead if running oil pump, get Power Addiction billet carb boots, mod the airbox and fit pipes.
Option 2) Use Polaris mod BB straps and add a spacer(1.5" or 2" I don't remember exactly right now), modify steering hoop and post or buy the Polaris mod steering hoop and post, notch MAG bulkhead if running oil pump, use filters or make custom airbox and fit pipes.
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