My 470 made 750 hp with the TF270 head and pump gas compression but it was a really serious build. I had to test multiple cams before finding one that worked just right. That engine also had a Wilson ported intake, Jesel belt drive, external oil pump, etc. It was more expensive than a typical bracket race engine. I probably had about $20,000 in that engine. I think it could be duplicated for less but a person would need to make all the correct choices.

The easiest way to make more power is to add compression. The 10.7 compression is going to really box you in. You can make big power with that compression but you get forced into a narrow power range and a very specific camshaft.