The most important phrases in motor racing worth remembering are:
'To finish first, first you gotta finish'
'Speed costs money, how fast do you wanna go?'
'BHP sells engines but torque wins races'
In my experience don't get dazzled by megga claimed horsepower, go to the best you can afford, and build an engine which is tractable and reliable. Spend the money you save on not having to rebuild it 3 times a year on learning to use the power you have to its best advantage. A well driven car will beat another with lots more power. Peter Knight is very good and I also had dozens of victories using Stuart Mathieson's engines from Mathwall Engineering, Thursley, Surrey. Good Luck,Andy.