View Full Version : 540 crate engine TRS engine swap

02-19-2016, 11:49 AM
Is there a 540 crate engine that will direct bolt to my trs transom assembly and motor mounts? If not any suggestions for a 550HP or more crate engine that would be an easy swap with little modification?
I have an 86 z-25 with the stock 370hp TRS block that has been built to 500+ hp and would not want any less HP in this boat. Thanks for any suggestions.

Holy Smokes
02-19-2016, 02:41 PM
You'd be money ahead to just rebuild your current setup and work with the builder to up the HP.

Pat McPherson
02-22-2016, 08:30 AM
Your original 370HP 454 is a Gen 4 block. Most 540 cube engines are bored and stroked Gen 6 502s.
I don't believe the engine mounting or bell housing mounts are different. The flywheels are different but I would think the trany coupler would bolt to either. Lots of builders out there that can put together a 600+HP 540 for you...