I've seen A LOT of posts about making HP with a 318-So why is it so ???

What sort of HP do you think my teener will make? I have a 1980 CM Chrysler Regal SE (the last of the Australian built Valiants) The 318 will be bored 30Thou with KB pistons (approx 9.7 to one comp) Summit 6901 cam 218/228 470 lift(1.6 roller rockers) 114 lobe centre, Procomp fully ported alloy heads flowing 285cfm on the inlet and have really good low lift numbers, Exctractors running into dual 2.5 inch system Wiehand alloy dual plane intake with 650 AVS2 carb , Factory cold air induction. You may ask why am I doing this with a teener? I have a 410 Charger that runs low elevens and am restoring this lovely Regal with the factory 318 and am using most of the left over parts discarded over the years from my 410 Charger. The car will probably never see a drag strip but will be just a cruiser as it only has 77 thousand kays on it(About 48 thousand miles) and was parked since 1995. Car is fully loaded with air, steer , elec windows etc. Has Factory 727 auto and 2.92 diff. What sort of HP would you think this should make? Why not put a 360 in it? 1 it is the numbers matching motor . 2 petrol in Australia is $1.60 @ litre ($6.50 a gallon)Yes costs nearly $120 to fill up now days but yes I believe our tradesman wages are a lot higher than the US wages.