Quick spec rundown as follows:
Standard 4v heads with single groove valves
Cam, Crow solid 272 / 280 duration @ 50, 630 thou lift
Holley 850 dp with 1" spacer (all under bonnet)
Holley strip dominator manifold
Zero deck height
TRW flatop pistons
cold dipped rods
4ma crank (bottom end balanced)
Pacemaker extractors 2" primary with twin 3' x-membered exhaust.
I am reasonably happy with the naturally aspirated dyno results, the Engine is a compromise, it has low comp to allow for the n2o which i can use at the track only, or the other choice is to remove the n2o setup and get some more compression into it, with 11:5:1 or more (which it can do with the large cam) it will go right over 300rwkw N/A.
I have just driven it and it goes quite well, lighting up the 275 tyres from 1st to 3rd gear, it should keep me happy for a little while, Hallam Performance have IMO done a great job getting the 270rwkw out of it with such a basic setup, so i will just enjoy it now, and weigh up the options next winter.
Edit, BTW this was done with a Mallory 140 using 3/8 fuel line.
Peak power was made at 7200rpm.