5.3 Vortec. Differences between Flex Fuel and Non Flex Fuel Engines.

[95ImpySS]

I'm curious if anyone knows of any real differences between the flex fuel and non flex fuel versions of the 5.3L Vortec engines. Planning on swapping one in a late 80's land cruiser and wonder if there is any pros or cons of acquiring this engine?

[Madman337]

Far as I know its a different fuel tank, lines ect and pcm tuning so you should have no problem with the swap.

[dawdaw]

what he said^^^^^... Injectors as well

[95ImpySS]

Sounds like everything I found. Some say the valves and seats are made of a different material but that shouldn't matter.

Thanks for the reply's guys.