My requirements... what to build?

Heres my opinion and as I live in Australia and everything we do is about 3 times the price of US What I have done. I did a stroked 360 (410) with cast crank and chev pistons edelbrock heads cleaned up by me,3.23 diff and 4 speed manual transmission. Australian Valiant charger weighs around 1400 kgs (3100 lbs plus driver) with small 228 @ 50 thou cam ran ran 12.1 straight out. I broke the cast crank so rebuilt with steel crank forged pistons @ 10.5 comp and changed diff ratio to 3.91 and put the next larger cam in 234 @ 50 thou and have run 11.4 @ 120 mph. This has given me the courage to go the next level and spend a lot of money for a fully ported set of alloy heads and go a larger cam to attempt to get closer to the tens. We in Australia are known to be called TAVO''s Tight Arsed Valiant Owners. This 410 combo has beat all my expectations for the money I have spent and is a massively drivable experience, current rear wheel dyno fiqures are 394 RWHP and 595 RWTorque. Car is very mild and would drive even better as an auto and returns 21MPG on a run.I would not look back on either a 318 or 360 stoker for ease of making HP for a very mild and drivable combo!