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2many · 10-05-2012, 07:07 PM

Just wanted to follow up. For my situation (454, 700R4, stock SBC motor mounts and crossmember moved forward a couple inches) the Thorley 304Y was as close to a perfect fit I could find. Cut a 1/2" half-moon out of the pas. side upper frame rail to clear one tube and NO modifications on the driver side (other than reversing the lower shackle bolt to better clear the collector). Supposedly a good header for this motor as well - hope to find out soon! Found on Craigslist for $90, too!

10-05-2012, 07:07 PM	#16
2many Registered User Join Date: Jan 2012 Location: West Jordan, UT Posts: 52	Re: Big Block Headers in a 4x4 Blazer Just wanted to follow up. For my situation (454, 700R4, stock SBC motor mounts and crossmember moved forward a couple inches) the Thorley 304Y was as close to a perfect fit I could find. Cut a 1/2" half-moon out of the pas. side upper frame rail to clear one tube and NO modifications on the driver side (other than reversing the lower shackle bolt to better clear the collector). Supposedly a good header for this motor as well - hope to find out soon! Found on Craigslist for $90, too!