The amount of $$$$$ wasted or not, on going for big HP,still can get lost in bad bit or too many lbs. of car and poor tuning. Often the real shows up, of what counts "HP to weight ratio" an good tuning. Cool factor is another thing,in my case I have old 1928 hot rod powered by old Ford Y-block 292 w 4x2 ect. but is under 1800 lbs loaded with me an gas. Raced a early 60s Vett ,very cool car with lots more HP. But the Vett is a lot more lbs. so he lost too a much older design engine. Ya,that really pissed him off. Sure I could put a SBC in my old rod,HP would go up,but to me cool factor would drop a lot. I like SBC V8s,even raced them as power in my oval track cars for years,still have 2 in the garage. My son has a SBC V8 in his 23 T-bucket,that will blow me in the weeds. Point is,there a lot of $$$$ used on getting even more HP,some times would of been better used for other parts of car.