well, where to start. I found out what the thunk was. A rocker arm nut backed off and the rocker came off the pushrod. So that cleared that up. Another problem arose. I bought a new battary, and it will crank and start fine when cold, after it heats up it cranks slow and i have blow by coming out of the valve cover. If i let the car run it gets so hot that it will blow into the over flow. You can also hear it bubbling in the motor after you turn the car off.

On a side note, i bought this motor with a crack on the passenger side of the block. it will leak coolent out of it but the machine shop i go to said that i could use he barsleak block sealer and it will be fine. I just dont know if the crack got worse or what the deal is. I dont have the time or money to replace this motor. So it might go up for sale.