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 230537 <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<br>Tanks: 3 1/2 AND 2 3/4<br>Rows: 2 5/8<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<br><br>Based on 60's style core with 1/2" tubes on 9/16" centers' the standard automotive core units are drop-in, stock replacements. Made from all new material they offer the highest quality for your stock application.<br>NOTE: We also offer this item in High Efficiency and Optima core constructions for added efficiency at added cost. Contact a sales associate for quotation.