[68blkbrd]

Had my engine rebuilt last year and installed. 400 .030 over, forged pistons, recon rods, new bolts, oil pump, crank turned .010, balanced assembly. Heads are 13 with stainless valves, Harland Sharp 1.65 roller rockers, (adjustable valvetrain) new pushrods, double springs,lifters, new seats, guides, retainers. Cam is Comp 292 Magnum (.501 lift) Headers, double roller chain, muncie 4 speed, Performer rpm intake, Holley 750 vac secondary, HEI with MSD6AL. mechanical advance recurved 13 initial 36 total. 3:23 posi
I thought I did everything right...

Well heres my dilemma. When I did pick up the car after the rebuld. I noticed a valve train chatter. I asked if that was normal with roller rockers and the mechanic said let it break in this summer and he will re-adjust the valves. 2000 miles later I bring it in. It wasn't running well and smoke was in the driver exhaust side. He pulls the valve covers and finds two broken valve springs, 1 broken pushrod, 7 bent pushrods and the valve seals cutting thus the oil in exhaust. I bought the springs new on ebay. He said the springs were incorrect and they were binding. He obviously neglected to check that everything was correct when he put it all together. All this on a F-in new rebuild!
He replaced all the springs with the "correct" ones. He also said the retainers needed replaced because they "fit the springs better" He said he milled the retainers down some because the were cutting the valve seals. He put new valve seals also. He said the exhaust pushrods were the only ones bent and replaced those with "heavier" ones
When I picked it up this time the valve chatter is the same. I asked him if these problems are going to happen again he said "I hope not" he says he adjusted the valves twice. He also said the geometry is correct. He did not elongate the pushrod holes.

Is it me or is he doing something terribly wrong? I have to trust the mechanic since I know nothing about engine internals. I'm afraid to run it hard. The chatter is very noticeable at idle. The lifters are regular comp cams hydraulics. It just does'nt seem to have a lot of power that I expected. Is there anything I can do or check myself to find out what may be wrong? I am not overly mechanically inclined when it comes to engine disassembly. That's why I had him do the total rebuild from driving it in and driving it out rebuilt. Unfortunately I paid hime over $750 to rebuild the heads alone the first time. The second time was $350 and there is still chatter in the valvetrain. I'm lost, feel ripped off and very disappointed and angry. Please help! What can I do?