The following were engine options for 1970 Ford Ranchero [Ranchero]: Inline 6 cylinder. Overhead valves. Four main bearings. Bore & stroke: 3.68 x 3.91 in. Displacement: 250 cid. Compression ratio: 8.5:1. HP: 155 hp at 4000 rpm. Torque: 240 lbs.-ft. at 1600 rpm. Carburetor: Single downdraft. Standard Ranchero. [Ranchero 500/GT/Squire; Optional Bronco/Econoline/Club Wag¬on]: V-8. Overhead valves. Four main bearings. Bore & stroke: 4.00 x 3.00 in. Displacement: 302 cid. Compression ratio: 9.50:1. HP: 220 hp at 4600 rpm. Torque: 295 lbs.-ft. at 2400 rpm. Carburetor: Dual downdraft. [Optional Ranchero]: V-8. Overhead valves. Four main bearings. Bore & stroke: 4.00 x 3.50 in. Displacement: 351 cid. Compression ratio: 9.00:1. HP: 250 hp at 4600 rpm. Torque: 355 lbs.-ft. at 2600 rpm. Carburetor: Dual downdraft. [Optional Ranchero]: V-8. Overhead valves. Four main bearings. Bore & stroke: 4.00 x 3.50 in. Displacement: 351 cid. Compression ratio: 10.7:1. HP: 300 hp at 5400 rpm. Torque: 380 lbs.-ft. at 3400 rpm. Carburetor: 4- barrel. [Optional F-Series/Ranchero]: V-8. Overhead valves. Four main bear¬ings. Bore & stroke: 4.05 x 3.78 in. Displacement: 390 cid. Compression ratio: 10.5:1. HP: 315 hp at 4600 rpm. Torque: 427 lbs.-ft. at 2800 rpm. Car¬buretor: 4-barrel. [Optional Ranchero]: V-8. Overhead valves. Four main bearings. Bore & stroke: 4.36 x 3.59 in. Displacement: 429 cid. Compression ratio: 10.5:1. HP: 320 hp at 4400 rpm. Torque: 460 lbs.-ft. at 2200 rpm. Carburetor: 4- barrel. [Optional Ranchero]: V-8. Overhead valves. Four main bearings. Bore & stroke: 4.36 x 3.59 in. Displacement: 429 cid. Compression ratio: 11.3:1. HP: 370 hp at 5400 rpm. Torque: 450 lbs.-ft. at 3400 rpm. Carburetor: 4- barrel. [Optional Ranchero]: Ram Air V-8. Overhead valves. Four main bear¬ings. Bore & stroke: 4.36 x 3.59 in. Displacement: 429cid. Compression ratio: 11.3:1. Horsepower: 375 hp at 5600 rpm. Torque: 450 lbs.-ft. at 3400 rpm. Car¬buretor: 4-barrel

Sources: [u]The Standard Catalog of Light-Duty Ford Trucks[/u]

Ford Ranchero's were equipped with a 155-bhp six-cylinder engine, the 1970 Ford Ranchero GT came standard with a 220-bhp 302 V-8.