Matt,
This should not be a decision you need to make, most definitely everything should be balanced all tolerances checked and then double checked.
The engine assembly area should be clean almost surgically clean, all parts must be cleaned and parts with sub assemblies should be pulled apart cleaned checked then assembled before installing into engine, eg
Oil pumps, pickups etc.
Care must be used when put together, piston to value clearance must be checked and rocker geometry must be perfect.
Spend the time and degree the cam a degree here or there makes a lot of difference.
Always use solvent based oils.
Use a good sump with gates, and install an
oil accumilator.
Well that’s what I do, the motor in my cobra has 485RWHP is 5 years old and as most people would know I am not shy to give it a hiding, I put it on the dyno just before the nationals and it still makes the same power.
There is so many aftermarket parts available these days, so when building a windsor use a Dart, world or SVO block, spend a bit more on a billet crank and some I beam rods.
Phil