You question is a bit puzzling; three hole neck mount Strats came stock with a different shaped neck plate; like the repro one at the eBay link below:
http://www.warmoth.com/guitar/necks/necks.cfm?fuseaction=heel
If you're ordering a Warmoth neck for that '72 body, you'll need to custom order a Vintage Modern neck; there's a $15 upcharge, see details under the "3-Bolt Micro Tilt Neck Mounting Holes" section on this page:
http://www.warmoth.com/guitar/necks/necks.cfm?fuseaction=heel