I use a test light with a probe - no need to remove the fuses.
Possible cause - there are three (maybe two its been a while) plugs that push into the back of the cluster - check that they are pushed right in.
OP had a drop of oil on dipstick - not an empty sump but still a worry. But probably not the cause of non starting.
How long was your rebuild? Could have stale fuel or crap in tank. Take out your fuel filter and turn on the ignition - plenty of fuel? Replace with a new filter and cut the old one open to have a look. Like they say - go back to basics - check the CAS - look for spark, injectors clicking - pull the plugs to see if they are oiled up and clean or replace. Double check the cam timing and cam belt.
Oil level ok? Sump plug and filter tight? Crap in fuel tank?
When you get it going don't idle it - push it hard without thrashing it and watch water temp and check for leaks.
In defence of my NZ made crank collars I don't buy the argument about excessive clearances. As someone in the link above said do what we do - Loctite the screws in the pump. If you are going for the big revs make sure everything is balanced and get a new harmonic balancer.
What Brennan said - Injectors, Hypergear turbo, new fuel pump Link G4 (get a mac valve to control boost). No need to change manifolds - spend the money on a good tune.
Buy Josh's turbo or get Steve Murch to make you one.
Most of the big power (1000kw) engines that Rips build are for drags - often with 2 speed drag auto and are useless for street or track. The engines he builds for road cars and track cars generally get by with half that much power.