1989 390 E.C. engine question

[wily temptress]

I have an 89 390 e.c. with twin 7.4 mercruiser bluewaters. My question is, my engines seem to be different from every other sea ray out there. My blue waters are bolted to volvo trannys. Not a big deal but, no one lists any parts displays for this configuration. My cooling system seems to be different from all others. I seem to have more coolers than most and they are in different locations. I am having some hoses start to degrade and am having real problems finding replacements. Does anyone else have this configuration if so any luck finding parts. Thanks in advance