Hey guys, m My rebuilt 350 recently started running really rough and no carb adjustments could remedy it. Checked for vacuum leaks and found one in the back of the intake. Low and behold there was actually oil pooling on the back of the block from the intake leak. As you can see in the pictures the rubber seal for the intake is not fully seated and sealing, on both sides! I can only imagine this must be the source of the leaks. I’ve read many things online, rubber seals, no rubber seals, black rtv/ the right stuff... rubber seals with a touch of rtv to hold them in place, but what is the best solution. I don’t want to have this happen again with the rubber seals getting out of position. Any advice is appreciated.