So I recently had to get some new heads for my 3100 engine and I decided to go the easy route and pull the brand new 3400 heads off my gf's totalled car. Had them checked at a local shop and they are still perfect.
Problem is I put them on the car and it runs like a dog. I hit the gas to accelerate and it barely wants to move. Does fine at like 25mph+ though. I am wondering what it could be causing the car to run this horribly. Noone locally can give me any advice on it at all, not even the local shops. Does anyone know something that I have been missing or is this engine just shot.
