Hey guys....the 4-core radiators do require
bigger brackets...The tanks (outside part of
the radiator) measure 2-3/4" inches on a
3-core radiator and jump to 3-1/2 on a 4-core.
Installing a 4-core will require new upper &
lower mounts, and all new pads. GMCPauls
sells them if you need a vendor....Just note:
Installing the bigger lower radiator mount,
you will need to make a notch in the core
support to allow the mount to extend out
slightly. (according to GMCPaul, this is the
way the factory did this) Also, I ordered
some standard radiator mounts from him which
did NOT fit the radiator....had an inner opening of only 2-1/2", too small to fit.
If it were me, I would keep the 3-core, but take a look at USRadiator.com , they sell a
high efficency rad, and and ultra high effeciency one....and can ship direct to you.
We just put a 4-core in another truck, radiator purchased from 1-800-Radiator and the 4-core mounts/rubbers from GMCPauls, it
fit (ok), but had trouble with SBC shround
not really matching up well. I purchase a
3-core high effeciency rad for my truck, havent got that far, so dont have any further
info on it....just got my truck frame back from the sandblasters and will be starting
re-assembly soon.
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71 Chevy C-10 SWB Fleetside WAS:307w/3-on-the-tree NOW:350TBI/700R4/3.73
See it at
www.prismnet.com/~grzanich