Critique/suggestions on 273 engine build

I was originally going to get a 318 and build it. I just thought that since this engine has a fairly fresh rebuild, I won't have to worry about rebuilding the bottom end. If I get a 318 (or anything else), chances are, I'll have to start from scratch and do a full rebuild, unless I find someone selling one that's already rebuilt for a decent price. I'm looking to get about 9.5:1 or 10:1 compression. I have an 8 3/4 with 3.23 gears (one legged) that I'm going to put in it. I know I'd need lower gears to get any kind of torque to the ground, but I'm just going for a mild street machine for now. The headers are the most expensive part of what I want to do. Cam, springs, locks, seals cost about $225, flat top pistons are around $200-250, the headwork would probably be around $300-400, new carb around $500, but I'm sure I could find a used one for a lot less, then the Headers-TTI at around $700, or spitfire for a lot less (but would require converting to manual steering which is more $$).
I would RATHER have a 340 or 360 with a lot more power than I'm going for here, but I've decided to work with what I've got due to cost.