The Truth about 318s

The other big factor here is heat control. Turbo's build heat so you need to control it in order to have a durable engine.

Which is why most current factory turbo cars have Intercoolers and why most older imports have them, too.
It's also the reason there are no untouched 2.2/2.5 turbo heads in good condition, too much uncontrolled heat.
Chrysler bit the big one by not intercooling them.

Mark.