Hi JVM13,

it will depend on what particular objective, as for me. i bought a s-10 pick up 1985 model with straight V6 engine, obviously I have to change my engine since I will be using it everyday, pull-out the V6 and change it to Mazda RF turbo diesel engine which I think fits perfectly, though my "mekaniko" recommended the 2.5 nissan eagle engine.

Bought the Diesel engine at Blumentritt at P 18,000 now i can use the pick everyday since its economical compare to V6 engine.

on the other hand, covertion such as this needs a very good mekaniko since it converts all the way to transmission up to the diffrential.