My 340 build

which motor gzig5?
b3 kit with shaft and roller rockers?
or?
what springs
what headwork for clearance was required
following readers will need to know

71 340. Pistons are unknown until I pull the heads. I've got a new set of PRW stainless steel 1.6 rockers that I've cleaned and deburred. Set of lightly used ProMaxx heads with their springs on the way. Chad from ProMaxx assured me that they would be fine with the .561" lift at the valve that will result. We'll see how everything fits when the stuff gets here.