340 to 273 tranny Question

Should be a no problem swap, Just make sure the flex plate on the 340 matches up to the converter on the 273 trans. Or just use the 273 flex plate if its a 1970 or earlier 340

You will need a new left side motor mount backet or the orignal that came on the 340

Make sure the water pump lower hose inlet is the same position as the 273