hi, I know there has been a few threads started on this already, but i was just wondering what the difference is between the '73-'76 headers and the '77 highboy ones. And also why wouldnt the lowboy ones work? If anyone has tried this, any info would help, thanks!

 

'77 they switched to the 351m/400

 

you looking for a set for a high boy w/ 351m/400?

 

oh, ic, and yes its for a 400

 

Does anyone know where to get longer headers to fit a 73 highboy with a 390? The ones I have that came with the truck ride the crossmember under the transmission. I looked around but nobody seems to have the longer ones that I need. Looking for ones about 3-4 inches lower.