Got the motor back in car but somethings not right

Hmm, i think weaker springs would allow the valves to float at higher rpms so you would feel that.. not sure what else it could be without hearing it sorry cudnt be more help.

Your set up is very similar to mine - mine has Y heads, 1.7 roller rockers, stock pushrods and a custom cam (ground by CompCams) with specs that are similar to yours. My heads/springs were new - they have no trouble controlling the valves up to at least 5400 rpm (the power peak is at 4900, so there's no need spinning any higher than that).

When you say you installed each pair at tdc -- there are 2 tdc's for each single rotation of the camshaft. You needed to install them at tdc on the compression stroke - when both lifters were on the base circle of the cam. If you installed them at tdc during overlap - both valves would have been open during your installation - don't want to do that. If you're at tdc on the compression stroke the proper procedure is to hand tighten the bolt until they're at zero lash (no gap between the pushrod end or the valve tip end) and then count the number of turns it takes until you hit the 22 lb-ft. torque. You should hit the torque between 1/4 turn and 1 turn of the bolt AFTER zero lash is reached. If it takes more than one turn, use shims to raise the rocker. If it takes less than 1/4 turn, either remove material from the bottom of the rocker fulcrum, or use a shorter pushrod. The ramp rates on your CompCam are much steeper than the stock cam. Even properly installed with correct clearances, they may be a bit noisier than the stock cam was.