If you are talking about the GT500 engine, it would be a VERY involved fit. Aside from the fact that it's physically wider and taller than the 4.6, you've also got a blower on top to add height, plus you have all the extra space needed for the blower drive system, and the very intricate coolant hose system.
It would be cool as hell though
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Sal Mennella
CSX 4241, KMP 357 - sold and missed, CSX 4819 - cancelled, FFR 5132 - sold
See my car at CSXinfo.net here >> CSX 4241