a H.O and a non H.O distributor like form a "mustang" to a "towncar"

 

If the non HO is not a roller cam (roller cams also came with the 1542.... firing order BTW).....the ditributor gear would have to be replaced to a steel gear.

 

well i pulled mine from a junk yard and it came out of an 88 towncar with the non H.O motor (pretty sure it was roller) would that cause any issues if used in a 1990 stang???

 

as long as you are using it on a non HO cam you will be all set, if running an HO cam, you need to change the gear

 

what will it run like if i use a non H.O distributo gear with a H.O cam?

 

Yup....'88 TownCar was a roller cam......you can use it as is.....it already has the steel gear.

 

It's not a matter of HO or non-HO cam.....it's a matter of material compatibility. The roller cams (HO or non-HO) require the steel gear, if you use a non-roller cam gear (iron) it will go snafu in the engine.....break, fu-cam or engine.