Thanks for the responce. I not looking for high high performance. The 305 seemed like a good choice for good gas milage and good performance. The heads are 1.72/1.50 or 1.84/1.50 valves (8795896). I see alot about 416 305 heads. I wonder if they would be a better choice? Im not looking to build a race truck and I don't want to spend alot of money