DarkShadow04

why is that? what did they do in 85 that is an upgrade?

86 5.0L

roller motor, more power, WC t5, but! it still had the weak 7.5" rear end so I would probably look at swapping that out with a newer '86+ 8.8"

DarkShadow04

i have my 28 spline 8.8 rear from my 04 sitting in my shed with the facory gears...if i just swapped in some like 4.10s would the 28 spline 8.8 be able to hold some DR's, or do u need the 31 spline to really launch like in my New Edge...

i still dont know wat this t5 is...is that the tranny? lol..and if i bought an 84 id want to convert to a roller motor...is it expenisve to convert to a roller?

TrimDrip

It is a Borg and Warner T-5. They are rated somewhere around 235lbs of torque I believe, maybe a little more. The WC t-5 in my 93 is rated around 325.

I am not sure on the flycuts on the pistons in the 84 models. I know on the 85s and 86s most aftermarket aluminum heads supposedly can't be used.

The roller cam is a more desirable cam than the flat tappet. Still doesn't mean a flat tappet can't be made to run good.

If you want to be ahead of the game a bit, I would look into a 93 cobra. Only downfall is the pistons are not forged.

DarkShadow04

from the gathered information so far, it looks like maybe i should just pass on this and keep my eyes open for a deal on something a little newer? it just seems like the 84 is a little too much to get caught up to the other foxes, even if the mileage is extremely low... i guess i should seek something newer with the world class tranny unless anyone has anything good to say about this 84?

Lazor05

Yeah T-5 is the transmission.
Please keep it a four eye
Roller motor is more desirable: less wear, can rev higher...
The 8.8 out of your 04 will bolt up but the axles will be 5 lug while the foxes have 4 lug. Thats ok though becasue 5 lug swap is a common mod. However, the axles are slightly longer than the fox axles so they will stick out a little. Also it probably has disk brake which is also an improvement, but it will require a bigger booster.
Aftermarket heads can be used with pistons that dont have valve reliefs just have to be careful with ptv. Still choices out there though.