The timing chain used in 87-93 is factory double roller design.. the 94-95 is called a "silent chain" style, and is much more expensive.
I just got done pricing the two for my stock engine.. the 3pc combo runs about the same through ford ($75 my cost), but the parts
stores house brand, around 27bux for double roller, and over 75 for the silent type. And the double roller is a lot stronger..
The factory silent chain on my orig. engine became so stretched that my car would not hold a set degree of timing, and there
is 1/2" of play in the chain... double roller FTW