i got an 383 with vortec heads and it going in an
91 s-10 i can't find any headers to work with my
vortec heads thay call the port an D- port same
as lt1 heads can you use ls1 hedders on an lt1
or vortec heads. you can get ls1 header for v8 s-10
any help or part number is apreseated  

LS1 engines are an entirely different animal than its LT1 and first generation small block counterparts. therefore LS1 headers will not fit an LT1 or a first gen (vortec and earlier) so you may have to get a set of headers custom made...damn thats gonna be expensive....hopefully someone else on here has a better idea......sorry dude