This is for the 1963 - 1965 Buick Riviera' the car was not available with a 4-row radiator, so the saddle mount insulators/rubbers will need to be trimmed to fit the radiator.<br><br>The radiator has a slanted upper tank and a center fill cap, which is specific to this car<br><br>The transmission cooler is 1/2-20 straight thread GM style. We have had a couple customers with a 5/8-20 straight thread. If you have that OE setup, please see the related adapter and purchase with your item. 227899<br><br>Core Dimensions: 17 1/2 x 25 1/8<br>Overall Dimensions h x w: 23 1/8 x 25 1/4 (includes cap and bracketing)<br>Core Thickness: 2 3/4<br>Tank Width: 3 1/8<br>Rows: 4<br>Tank Construction: Aluminum<br>Core Construction: Aluminum<br>Hose Location:In - Passenger, Out - Driver <br>Inlet Diameter: 1 1/2<br>Outlet Diameter: 1 5/8<br>TOC: 1/2 20 Straight Thread G1/4 <br>EOC: NA <br>Mount: Saddle<br><br><font class="HiliteFONT">Suggested Add-Ons:</font><br>Radiator Cap (<a href="http://www.radiatorexpress.com/product.asp?part_id=221633" target="_blank">SKU 221633</a>) <br>Thermostat Relay Kit (<a href="http://www.radiatorexpress.com/product.asp?part_id=221453" target="_blank">SKU 221453</a>) <br>Overflow Tank (<a href="http://www.radiatorexpress.com/category.asp?cat_id=R023" target="_blank">See Category</a>)<br>One 16" fan recommended for this core size (<a href="http://www.radiatorexpress.com/product.asp?part_id=221446" target="_blank">SKU 221446</a>)<br>Add external oil cooler (<a href="http://www.radiatorexpress.com/product.asp?part_id=221617" target="_blank">SKU 221617</a>)<br>Add flex radiator hoses (<a href="https://www.radiatorexpress.com/category.asp?cat_id=R059" target="_blank">See Category</a>)<br>