hey man, im not sure what kind of heads they are but 94 and 95 gt's take 2545's. Regular gt40's take 765's. And stock 87-93 heads take 25's. THose are all autolite part numbers. The only difference between a 25 and a 2545 is the shank on the end... the 2545 has the threads that have more of a shank so they will go down in the head further... the threads on the 25's wont reach the spark plug hole if you try to putem on a 94 or 95. hope this helps man
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