Option 1: stay semi-stock. Go 289, go Edelbrock RPM matched components...intake, cylinder heads, camshaft, lifters, springs, retainers, timing chain, all in one kit. Matched components work well. Tuned headers. Stock dizzy, recurved, and a Pertronix II pickup plate. Pro's...still looks stock, high-rev screamer.
Approx cost...$1800.

Option 2: stay reliable. Go 351W, stock heads and bottom end, dual-plane intake, mild (270) camshaft, headers, stock 351 dizzy, recurved, with Pertronix. Pro's...still looks stock to MOST, low-end torque, long-distance driver.
Approx cost...$1300

Option 3: street KILLER. Go 351W, Scat performance 426 Stroker kit, block decked to 0, Edelbrock RPM matched components again, roller valvetrain, Holley 700 cfm vac secondary w/dual feed, tuned headers, Davis Unified Ignition HEI. Pro's...wicked fast, sounds great.
Approx cost...$3100

I have the last one in my leddsled, and can't keep it in rear tires.

There are many other options out there...302's, Clevelands, 390's, 428, 429, 460. I heard there is a monster stroker kit for the 460 to get 530 cubes!

Keep us updated if you make a decision and we might be able to help you source some parts.