Stock springs are easy. I just put the valves in place, put the chamber side of the head against my knee and press with my thumbs. For 26lb springs, this is a little tough but doable. For heavier springs, I fabricated a spring compressor using 6" C clamp from harbor freight with a 1/2" threaded conduit connector and a 1/2" washer.
yea i have the 26lbs springs i got the intake side done. exhaust is killing me. plus i dont have the caps that have a open and lock side. i have to use the clamps to hold it there. anyway i can buy yours lol