New cam...loud clacking lifters. ???

Mike Liston, Thank you very much for your time...I'm so bummed out today...spent alot on parts over the winter like water/fuel pumps, tune up parts, gaskets, hoses, dress up stuff...Comp. cams tech line said this would be fine with a stock 318...just check for spring bind...did not have the heads off to check valve clearance...rotated the motor 3-4 times b4 firing and did not feel anything... also... if you read my original post, I added the second set of push rods @.050+ and stayed the same noise level. Would you pull a head off to confirm at this point?? (if so I'll give you my address!) just joking... thank you for your input, Dan