I could be way off base here because I don't know a ton about Volvo's. I
believe the 270 was a 350 Chev, 270hp, I believe the 740 was the 454 Chev
(7.4L).. It would depend as much on vintage as anything else since there
was a change there from inch to metric attachment points. If however the
engines are in fact 350 to 454 most mounting points should mate. Chev was
famous for making all its engines generic on mounts, most V6's and V8's are
interchangable bolt ups and even many of the inlines will bolt in. As for
the drive, can't help you much there. If the 125 is as strong as an Alpha
One, then it will hold the 454 on a lighter boat that isn't hammered off the
line. It's the torque as much as anything that will eat the drive and the
loading is worst if you apply full throttle from a standing start.

He has to find out specific engines in question, find out if it is inch or
metric block(s) and verify that in the case of a Volvo, the mounts still
match. Also let your friend know that he needs to asses his uses. He can
modify a 350 Chev to reliable 300-325hp and it's torque will only increase a
bit. A stock 454 runs 330hp but with more drive eating torque and more
speed and fuel eating weight.

Greg


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"tonycougar" wrote in message
...
Hello,

My friend has a Volvo Penta 270 Outdrive in good condition hooked to
a Volvo AQ125A. He wants to swap it out for a Volvo Penta 740 (?)

Can This be done with the current outdrive? Is there anything that
needs to be replace like the bellhousing or is his only route
upgrading the outdrive.

Tried talking to some volvo marine dealers but all they want to do is
sell you a complete new engine.

Thanks!

Tony