header help??

i went 7.40 with the flow tech headers in a 70 duster all steel ..so you would be ok with those listed above unless you just have to have a big tube or name header....but thats just me ..:burnout:

also you gotta think about the header size..the bigger the pipe you lose low end tq....i had some hooker headers 1 7/8 and didnt pick up a thing using them on my motor..but it wasnt anything to write home about either...just ran ok...