hooker comp headers
manualstearing usualy leaves some more space for headers are you sure the engine realy is in the correct location? thinking if the solid mounts for the engine does not put the engine in the correct location here are some measures for where it is suposed to sit
http://www.ttiexhaust.com/Tech Help/EngineLocation.htm#Specs
thats all i can think of that may bee wrong
but if you are tallanted with a welder you could also buy some nice mandrel bends in the right tubethicknes and do some cuting and welding to get the headers right but it may bee alitle time consuming..