Chris craft engine swap, 305k to 327k is it possible?? Or other options

[enki22]

Hello boaters, I have a catalina 251 1979 it has a 305k engine, but the original engine had a crack in the block, i was wondering if a 327k engine would fit in the engine bay which originally held the 305k maybe new mounts???? please help

[Docksidemarineservices]

The block will bolt right in. FYI A lot of the Chris Crafts had Counter rotating engines in them.

[enki22]

The block will bolt right in. FYI A lot of the Chris Crafts had Counter rotating engines in them.

so it would fit than? just to be clear, the 327 is counter rotation

[enki22]

also another question arose, would the transmission of the 305k fit the 327k??

[Docksidemarineservices]

The blocks are the same. You have to check to see if your original engine is counter rotation.

[captlee]

The blocks are the same. You have to check to see if your original engine is counter rotation.

Just to be clear, when you say "counter rotation," are you referring to a right-hand turning or left-hand turning engine? Thanks.

[Docksidemarineservices]

Yes. Looking at the flywheel (back of the engine) CCW is standard rotation. CW is right hand or reverse rotation. With the year of his Chris Craft his engine should not be flywheel forward and may be a Reverse rotation engine.

[RicardoMarine]

Standard LH Rotation is same as automotive.





BTW, you can very likely build a SBC Marine 5.7L more cost effectively than you will be able to build a 327.


.

[200toncapt]

The 5.7L is the way to go. I had a 1969 w/ 327Q . Not much more top end but was defiantly better on fuel. The engine won't work as hard. Everything was a direct easy swap didn't have to modify a thing. I bought brand new
"Pro-Formance Marine" engines.






BTW, you can very likely build a SBC Marine 5.7L more cost effectively than you will be able to build a 327.


.[/QUOTE]