maprato

I bought a 90 mustang and was told it had a 289 hipo motor in it from a 68. when I removed the valve covers it was stamped with a 65, so it appeares to be a 65. It also had slotted push rod holes, which would conferm it to be a early65. when I looked at the rocker arms there was no nut on the stud, but the studs appeare to be held in with roll pins. also had a 5 stamped on the outer edge of the heads. Is it just a 289 from a 65? or maybe proto type of some kind????

clowe1965

Pull a lifter out, it its a solid lifter then maybe. Hydraulic lifter, youve been scammed. Though i don't think hipo motors were made past 66.

Coupe

Where "289" is cast into the head between the valve springs, does it have one or two dots above the "289"? Two dots = Hipo/K code...

Starfury

Also, hipo valve spring seats are cupped at the bottom.

andrewmp6

The odds are its a normal 289 a lot of people say engines are things they ain't.

Al Newman

How the heck did anyone take the time to get a HiPo 289 into a 1990 car and get it emissions legal? Rocker studs secured with a roll pin would be pressed in, whereas the HiPo heads would have had screw-in studs. Not likely that the motor is HiPo. Everything about the setup seems wrong. Just sayin'
Best,
Al

maprato

thanks for the reply. there is only 1 dot c code

maprato

thanks for the reply. dont have to have an emissions test done in MI. yeah it looks like a regular 289.