I'm in the process of rebuilding my 455, the long block is going down to timinator to be done up for me. In cleaning my intake I noticed 2 cracks, one on each side of the exhaust crossover, since Tim will either filling or blocking off the exhaust on the heads should I have to worry about the cracks?, have them welded? is this a job for good ole "JB"? I can post pics if needed.
Thanks in advance.