Upgrade from 3 row radiator saddle: 2 3/4 driver, 3 1/2 passenger thickness<br><br>This build features a HE = HIGH EFFICIENCY copper core. This design utilizes 1/2 tubes on 3/8 center to provide 20% more heat transfer points than a traditional core.<br><br>Have a factory 3 row copper installed and looking for more cooling. This 4 row is designed to fit similar to the factory 3 row with the same side tank designs.<br><br>If you have a factory 4 row OEM (3.5 thick on each side, see other SKU 231213 for high efficiency design with thicker side tanks. <br><br>Specifically designed as for the 1966-1970 Oldsmobile series with 1 3/4 bottom radiator hose diameter OD. <br><br>Copper Brass all metal original style radiator is built to order in the USA. Allow 4 week build time. Item will be made with automatic transmission. For manual, specify upon ordering.<br>Purchaser is required to match illustration, thickness and measurements prior to purchase to ensure fitment. Item sold as illustrated and described disclosing model information is added as a reference. Custom built items are non returnable (12 month exchange warranty included)<br><br>Notes <br>2-3/4" Wide Driver Mount, 3-1/2" Wide Pass. Mount, Factory 2 5/8" Thick Core<br><br>Core Dimensions: 17 x 28-3/8<br>Overall Dimensions: 27 1/2 x 24 3/4<br>Hose Locations: IN-PASS /OUT-DRIVER<br>Core Thickness: 2 5/8<br>Tanks: 2-1/2<br>Rows: 2<br>Tank Construction: Brass<br>Core Construction: Copper<br>Inlet Diameter: 1 1/2<br>Outlet Diameter: 1 3/4<br>TOC: YES, 12 1/2 - 5/16 IF<br>EOC: NA<br>Mount: Bracket Mount