Quote:
This is a three step plan.
First is a 350 or 383 engine built for LOW RPM operation and MAX torque.
Second using a 80's TPI system.
Third adding a second overdrive transmission behind the stock 4 Speed automatic transmission.
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You've gotten some good advice. Look for the Caprice wagon thread
https://ecomodder.com/forum/showthre...mpg-33961.html. It has a good summary in the first post.
I assume you're attached to the vehicle. My van had a 1600cc flat four, 3/4 ton axles, with sway bars and suspension mods. It got 30 mpg, topped out at 85 and would top the Coast Range at 75, empty.
My idea of a super MPG van would be a Previa with an EV conversion.