Bass Boat Central, Scream and Fly, Face Book (high performance boating), Chris Carson Marine (Florida)... you may have to go up or down (150 to 200) on horse power and size (2.0 to 2.5) for a replacement?.. jus do ya research on anything, anyone ya might find!!!.. lotta butt-heads out there now days.
justa 'bout everything BUT block half, pistons, rings, center main bearings (different crank) .. as for everything else ya gotta know tha difference, but can be used.. tha 150 is a 2.0 steel sleeve motor and your 175 is a 2.4 chrome (same as 200) bore motor which is tha MAIN difference
None of the reman companies I know of even offer a 2.4 anymore...best bet is to find a older 2.4L Xr4 power head if possible. From the prices I have seen for a reman powerheads you may be better to part it out and buy a complete running 2.5 as prices are close to same.