I have a 73 Blazer with a 383 and bowtie heads. I e-mailed Doug Thorley's to see if the Try Y's would work, but unfortionatly they won't. Right now I have Headmans that have been cut, reworked, rewelded and banged in to fit my plugs and wires. I need quality headers for bowtie heads! I will also take suggestions on how to run my exhaust. Thanks!!!