Swapping 289 for 4.6L ???

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New project, Bought a 66 conv. less motor and trany, needing floors, rear quarts and one front fender. Also put a bid in on a 1999 ford crown vic police cruiser in my town's auction, I won it for ($12) twelve dollars. Car was hit on rear quart, no damage too drive tran, have complete P71 4.6L and trans with only 61,000 miles on them. I don't have the 289 that was in the 66 too get measurements from. Will the 4.6 fit in the engine bay ??? On a nother note looking for good vender for after market parts. Have year ones and NPD catalogs. Have no problem spending money for better parts, then fighting them on the install. Thank you for any help...mike