Hey whats up guys, just a couple of questions. I have a 90 fox GT and a 90 Grand marquis both with 302's. Questions about the HO and non HO, is the marquis a non roller? The intake plenum goes the other way on the marquis, other than that what are the differences between the two? The 90 gt mustang is def. a roller right? What would be a good injector/maf/throttle body combo to start with on the stang? Its all stock. What are stock specs on factory injectors? Thx!

 

Marquis 302 is a non roller motor with a different firing order. But mostly the only difference is the cam and the valve train and possibly the pistons. I am not 100% sure.

 

IIRC, I am sure Hurst will be in shortly to clarify.

 

The non HO motor has a 1-5-4-2-6-3-7-8 firing order. The HO motor has a 1-3-7-2-6-5-4-8 firing order and a reverse rotation water pump and front cover. All of the HO motors (except 84 and 83 mustangs) have roller blocks. The non- HO motors are non roller except for a some of the models made in the 90s.
The stang is definitely a roller. Stock injectors are 19 lbs. Im doing a 70mmtb/75mm MAF sensor calibrated for 30lb injectors, but I'm doing a HCI swap first. (I have a 95)