So the 1966 Skylark GS 401 I just picked up has a leaky original radiator and the local radiator shops want $500 and 3 weeks to re-core it. Which I may do later....but to get her running.. I See us radiator sells a direct fit. They run $500-700 and lead time around 3-4 weeks. Which I believe classic industries and OPGI sells. http://usradiator.com/buick-gs-1965-66-v8-401-radiator.html PN - 005157ANN or in aluminum PN - AL005157AADZ So I am trying to find something that fits and is available quickly for less money. I found a post on someone using a griffin aluminum radiator in a 401 GS car. But did not have auto trans cooler lines or a drain: Griffin #26242-X $180 https://www.summitracing.com/parts/gri-1-26242-x I did find one from Griffin that did have the auto cooler that has the same dimensions was available and ready to ship from Summit. Griffin Thermal Products 1-56242-T -$340 https://www.summitracing.com/parts/gri-1-56242-t Inlet Location: Upper passenger side Outlet Location: Lower driver side Overall Width (in): 27.500 in. Overall Height (in.): 19.000 in. Overall Thickness (in): 2.500 in. Row Quantity: 2 Trans Cooler Line Connection: 1/4 in. NPT Trans Cooler Adapter Fittings Included: No Radiator Inlet Size: 1.500 in. Radiator Outlet Size: 1.375 in. Tube Size: 1 1/4 in. Only issue I see is the outlet size, which is 1.375 or 1 3/8" Which I should be able to be address with an aftermarket lower hose: this hose may work... ACDelco 19163097 or ACDelco 88872602 or VAICO V200147
Put this one in my 67 GS400. I'd guess it would work in a 66. It was $192. Champion Cooling Systems AE571 All Aluminum Radiator Available on amazon free shipping. Mine showed up fairly quickly
found this one too... https://www.coldcaseradiators.com/p...an-sport-wo-air-aluminum-performance-radiator
The old radiator has had it... soldered many times and only had 2 rows, doubt it cooled much. So I bought the Griffin Thermal Products 1-56242-T -$340 on Summit and it fit pretty well in my 1966 GS. The only issue was the cooler fitting need to have an adapter added for the lines which I happed to have from another car. But the size and outlet spacing were all good. The radiator was supplied with a drain cock. I just spray painted it black because I don't like bright silver ones. Fits well: