1938-1948 Ford Mercury flathead aluminum cylinder heads by Edelbrock 1125. This 24 stud head is cast at the Edelbrock foundry in the USA of T-6 tempered A356 aluminum. Rugged design, ribbed internally and externally with a large water capacity and excellent breathing characteristics. Provides an 8.0:1 compression ratio on blocks with a 3/16" base relief (stock bore and stroke). Compression ratio increase is approximately 3/10 of a percent with each 1/8" stroke. This original Edelbrock design features 65cc combustion chambers. Sold as 2 cylinder heads. TECH NOTES: Use Fel-Pro 7548 or Victor copper 3036 cylinder head gaskets. 1938-1948 Ford Mercury flathead aluminum cylinder heads Edelbrock 1125 Edelbrock 1125 Order quickly and easily over the internet on our secure YAHOO! system 24 hours per day or talk to a real, live sales person at 419-331-2470 during our business hours. WE TAKE ORDERS to CANADA. For ordering information, click on "Orders to Canada" at the top left side of this page. LOW COST SHIPPING! Just $12.95 to ship your entire order by U.P.S. ground within the continental United States. Purchase any quantity of items and you pay just $12.95 to have it shipped! The more you order, the more you save! Orders to Hawaii, Puerto Rico, Virgin Islands, and some parts of Alaska will have shipping added due to having to be shipped by air freight. Customers from these states will be emailed the shipping costs for approval before we ship the order. We use Postal Priority for APO and FPO addresses only. Additional shipping charges may apply to APO or FPO addresses. Payment Methods: CREDIT cards or DEBIT cards VISA, MASTERCARD, DISCOVER, AMERICAN EXPRESS, MONEY ORDERS.