Something isn't right..

If it’s lean it will pop one time out the carb when you mash it. If it’s rich it will pop and bang repeatedly out the exhaust. What do the plugs look like? And what’s the timing curve like?
After the initial break in with the first carb I checked the plugs and they were very clean.. it's more of the repeated pop like rich and now unlike the break and run we're getting a rich smell and a Little smoke.. the brand new MSD distributor had the factory heavy silver Springs and we suspected something like that because under throttle is when it's happening and I suggested we did the light silver spring and a Blue spring like I have in my car for a faster ramp up.. unfortunately the timing is just set my ear as my timing light seems to work for my 6al but his 7al has it jumping all over the place.. I've tried a couple different positions and that hasn't worked but I do have it in a spot that starts and stops and after doing this for a long time by ear feels quite good...
you didn't lose a lobe, did u ??
Yes I was starting to feel that and especially I got feeling was from the passenger side. I took the valve cover off and had him turn it over several times and felt the rockers and they all seem to stay tight as it has hydraulic lifters but that's as far as I went... Again I'm there to assist my customers and give them my best advice not tell them how to run the show and when they want to go a different way I just follow what they want...

Have ya checked the valve trian to see if there’s a lose rocker? That the first indication of a cam going south. If yes, I’d pull the intake and take a look at the cam / lifters. Check to see it the lifters are spinning not stuck. Yeah it kinda sucks to do it but it’s the best way to find out. Did you cut open the oil filter and check the oil after break in? A friend had a cam go south in about an hour after break in last summer.... the cam ate the face off an EDM lifter...
Yes I'm not afraid to get into the motor or pull the intake that's not a problem but we're trying to exhaust the simpler avenues first just tuning.. again I'm there to help my customers do what they want and not tell them what to do... He did change the oil and he did cut the oil filter open and said he seen nothing....

Been seeing a lot of folks having new cams/lifters go bad very quickly. UTG talks about current quality control across the board is in the toilet. Local shop I work with told me yesterday that they built a flat tappet cam engine for a customer and the new lifters failed and ruined the cam.
I help this customer between 4 and 5 years ago get his Dana set up and get this project started... He kind of dropped the ball for 4 years so all of the stuff has been sitting for 4 years.. the built bottom end was wrapped in cellophane from the machine shop. The lifters were still in their box. The transmission was still on the floor where I left it 4 years ago... I'm there to help my customers if they want help I don't bang on their doors for work... It's quite funny how I got back in touch with this guy as he put an ad in the parts section looking for help with his car and had a picture of it. I go hey that's so and so and gave him a call.. when I told him who I was he was extremely excited that I called and had said he lost my phone number and wants to get started back on his project again...

Cam lobe wiped out my guess also...
Of course it was one of the first things I thought as well.. I did check the passenger side like I said and I will check the driver side the next time I see him. What's taking us down the avenue of the carburetor is again when we broke it in it was doing okay except for when you started to rev it up a little bit too much. Which was kind of leaving the idea in my head there may be a bent push rod... (Hopeful I know..) when we put the new carburetor on there that seemed to solve some of that and adjusting it solve quite a bit of it so that was what was leading us down the road of maybe it's just more adjustment on this carburetor. But again now we have it to where it seems perfect then we take off to go drive it and all is not happy...