I'd say get the blower cause it's easier to install and will give you a bigger bang for the buck. Plus you don't have to go through the trouble of pulling the engine out.
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THE SLO PONY
1992 Ford Mustand LX. 2.3 liter four-banger, auto. Future mods: V-8 swap.

Fly it loud, Fly it proud!!!
If it ain't broke, you ain't tryin hard enough