Suggestions for a 318 build

Howdy all,
I have just aqquired a '73 318 and a A904 tranny for FREE! I want to build a somewhat mild to medium street motor. Nothing crazy mind you but enough to kick some import butt and some modern day rides. Looking for around 300 horses with non exotic parts. This build will be going into my '67 barracuda which now has a 273/A904/7 1/4. the car is bone stock and I like it that way. Will want to upgrade the rear end to a 8 1/4 or 8 3/4 if I can find one at a good price

What modifications should I consider on the 318. Overbore? pistons, rotating assembly, heads, intake etc? I plan on taking my time with this to do it right! So the budget can be spread over time.

Anyone know a good machine shop in the central Texas area?

Thanks,
John D. Beckerley
Austin, Texas