Thanks for the other alternatives 91LX...
Good suggestions too..
(I didn't know the 2001 heads were different than the 99-2000 either)
I could be wrong, but I have a feeling waldoo isn't planning on having his ride down for the time it would take to accomplish an engine swap.
Also, I "think" he's looking at someone else doing the labor, which means just porting and\or swapping out heads gets to be expensive, much less the cost of swapping an engine...
(I've been known to be wrong before...

)
I myself am not a pro yet, although the rebuild of my 83 has me learning quickly...
Anyway you want to go with this waldoo, I'm sure everyone in the forums will be happy to help you as much as they can...
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"The Yellowjacket"
1998 Mustang GT
13.97@103
"Hey, you weren't supposed to be that fast!"- Turbo Eclipse Driver