Looking into rebuilding my 3.5. I would like to bore it out not sure how far but I would like to take it beyond the 3.7. Just curious if it is worth rebuilding or just adding the 3.7.

 

Don't waste money on the 3.5, look for better options.

 

The 3.5 and 3.7 have cylinder liners so "boring out" would not be as easy due to having different liners need to be made and verifying there is enough material. If you can find a 2007 3.7L its a plug and play deal. The 3.7 in our 2007 went before we bought it and previous owner bought our old 3.5 from our 2006 and installed. Been driving it for a couple years now no issue related to swap.