You can't... the compression ratio is different along with the pistons,
crank, arm, etc... they are all beefier. You are better off parting the
whole engine out of a donor car.

Don't, the non-turbo engine doesn't have the internal design to handle
the 40% power and BTU increase.

Turbo engines have oil cooled pistons, a higher volume oil pump, turbo
boost regulation (for engine safety) a nitride hardened crank shaft,
sodium cooled exhaust valves plus - a turbo - beginning to get the picture?

Actually, its much cheaper to sell your car and buy a turbo car than to
undertake a conversion that will always have a "story" or loose end
about it. The converted engine will have a shortened useful life and the
modified car a value question about it when you want to sell it. And
we're looking at cars that are 25 years old with modest market value so
why invest a lot of labor in a 25 year old car? It doesn't compute.

If you want a project buy a cosmetically marginal turbo car and restore
its luster - then you'll have a turbo engine and a nice car that has a
reasonable market value.

Cars can be repaired by DIY owners for reasonable cost but changing a
car is difficult.