273 to 340 swap in 65 dart

I'm getting close to tearing down my 340 with X heads and LD340 intake with 600cfm Edelbrock carb and Dougs headers. I have the conversion engine mounts, driveshaft, & 833 to hook it up to 8-3/4 already installed. I've seen threads covering these conversions but can't locate them now (naturaly). My biggest concern is remembering somethig about using a Summit ? (Mopar Performance) ? aluminum water pump. I'm also going to need a mini starter. Cheapest place to purchase these?
Any sage wisdom from "been there, done that" or a link to a site or thread that covers the conversion?

TIA

Jim