I had a set too but they were on my '79 f-100 with a 302, It had an edelbrock intake, holley 4bbl, a fairly mild comp. cam and long tube headers.
They sounded pretty good and lasted me a few years.
They aren't the greatest but for the price they aren't bad
they had a fairly deep throaty rumble to them but weren't real loud.
hope this helps some
I guess if you already bought them then throw them on and you tell us how they sound

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'88 lx, Black on Black, check it out
here
Spent all my money on school, what a dumb mistake
I'm old enough to know better, but still too young to care.