I fixed the issue with the plugs. NGK recommended a different plug with a non extended tip. This fixed my interference problem between the piston dome and spark plug electrode. My timing was also way off: 30 deg initial. Used a timing light and set it at 13 BTDC. Then went through the Weber procedure to set the idle mixture screws. With everything done, I fired her up and adjusted idle. Still need to synchronize the Caribs. Here’s a video
D6FD64D0 D1F2 4BA6 BE04 C6B41C6D5034 - Sendvid