Slow rev issue

Alright guys and gals I need help quick. Just got my motor in my car and finally running. Problem though is if you floor the gas pedal it revs extremely slow and then right around 3.5k-4k it shoots up like it normally would. Any tips or points in the right direction? I’m going to head back out there and give it a look and try a few more google searches but hoping you guys might know something.

Never mind I’m an idiot. Shouldn’t have assumed that the motor was properly timed. Pulled the cover and the intake cam was off by one tooth and the exhaust side off by almost 3. Fixed and now rev’s great.