Any antifreeze which is Dexcool approved.
You should check your fluid levels, your oil and coolant.
That engine has a ROLLER CAM AND ROLLER LIFTERS
There should be advance marks on the harmonic balancer, and timing marks on both timing chain gears.
You MUST have a engine scanner to set the timing. The timing on that engine is computer controlled.
There are 6 bolts in the bell housing that hold it to the rear of the engine.
When the engine is cold , the coolant ( antifreeze and preferably distilled water mixed 50 / 50 , no more than 60 % antifreeze ) is up to the cold mark in the engine coolant white plastic reservoir
can the valves be adjusted on a 1998 454 7.4 vortex with the roller lifters
Vortex Game Studios was created in 1998.
A head gasket is leaking or the Head is cracked.
It will use normal antifreeze and it should be mixed 50/50 with water. It does not matter.
Green
According to the 1998 Ford Ranger Owner Guide : The 2.5 liter four cylinder engine ( with air conditioning ) has an engine coolant system capacity of 7.2 U.S. quarts So a 50 / 50 mix of antifreeze and preferably distilled water would take : ( 3.6 quarts of antifreeze ) * Ford shows not to exceed 60 % antifreeze