I have put a new crate motor in my project blazer and I need to figure out a new exhaust system because the passenger exhaust manifold is cracked and the y pipe was made to fit that manifold and the exhaust diaphram. I want to put headers on buti do not want to buy two of everything and if I can do it all myself that would be great. I have looked at Thorley headers that merge into a y pipe has any one used these and or has any other ideas that would be great and could send pics. Those dam CATs are expencive and I have to take it to emissions when all is done. Thanks to anyone that can help.