Hi Frank
Really appreciate your response. The car currently has a Toyota engine and transmission. Just to summarize my choices

- M102. Needs to be converted to carburation as I don't have the ecu and wiring loom. After the conversion my wild guess is that the output will be somewhere around 105-110 BHP with better low range torque.

- M123. The engine has been started today keeping it on the ground with the different carburetor. Wild guess is that the output would be close to 120BHP. The brace (if i have understood correctly) has been removed earlier for installing the current engine. Certainly this engine would drink more in comparison to M102.

Given the options, probably the M123 would be a better choice for simplicity and for being close to original.

Your comments please.