Help! Swapped 302 heads on my 318.

So i dont know the cam specs. It was in the motor when i got it years ago. I know its a mild cane cam. When i put the pushrods in i had the intake off and made sure they were seated in the lifters. They were the same ones that were already in it. The cam looked really good still. When i hand turned the motor with the valve covers off i didnt notice anything out of the ordinary. There isnt any adjustment on the rockers. They are just the stamped steel ones. I didnt see anything popping. When you try to crank it you dont hear anything radling around only when i fires up
Uuuuh.... You can't stamped, non-adjustable rockers with a solid lifter cam unless you are incredibly lucky on all 16 valves! Are you sure it is a solid lifter cam? That needs to be known 100 percent up front.... No guessing or speculation. Do you have any pix of the lifters? Any paperwork at all? If you don't know please find out 100 percent so we don't all send you to buy the wrong new parts!