89 notch? Man that engine bay ishome to the windsor family of blocks.
Going nodular would be a major under taking I'm thinking.
I crammed a nicely tuned 351W in the boy's 89 GT.
It ran 7.70's right out the box with 373's - gears stock suspension and 8 inch dot slicks, not bad for a ford I thought.
A single 150 shot of funny fumes ought to put him in the high sixes.