Radiator problems! big block swap, RV style truck, etc.. frankenstein parts!

[BBC Beater]

This is probably gonna take someone who really knows these trucks to answer this... lol

Here's what I've got 90 RV style 1 ton crew cab 4x4 that has a 454 swapped in from a 350.
And here's my problem, I need a 4 core radiator and shroud and yes, I should have got on here and asked questions before buying parts.
I have bought (coming in the mail) a fan shroud off ebay that was for a 79 suburban with 454 and I have access to a 4 core radiator from an 87 chevy.

Only thing is I checked part numbers for these items and I found that 73-87 used the same radiator, but different shrouds. So I'm assuming shrouds should be interchangable on these years.

But here's the kicker, for my 90 RV style crew cab, the shroud, and radiator part numbers are different from any 73-87.

Is there any way to make my combo work, or will I have to start from scratch? I don't mind modifying stuff or even cutting stuff if it isn't too troublesome, any expert opinions.

Thanks
Joe