A '79 datsun pick up would have came with a 2.0L L20B engine.
Yes, you can install a 5-speed transmission on a Datsun 610 or L20B engine. Many enthusiasts opt for the Nissan 5-speed transmission, such as the FS5W71B, which is compatible with these models and provides better gearing for improved performance and fuel efficiency. The installation may require modifications to the transmission mount and driveshaft, but it's a popular upgrade among Datsun enthusiasts. Always ensure you have the necessary parts and follow proper installation guidelines for a successful swap.
The 1978 Datsun 620 pickup truck typically comes with a 2.0-liter L20B inline-four engine. This engine is part of Datsun's A-series family and is known for its durability and simplicity. Some models may have had optional upgrades, but the L20B was the most common engine for that year.
As long as its an "L" series motor Like the L28b(for example) will bolt to any "L" series transmission like the 510 that bolts to the L20B four cylinder. Another great thing by DATSUN
With the 4 speed manual trans, 106 mph.With the automatic trans, 103 mph.
Right behind the oil dipstick.