The info on the 1971 340 TQ in Shepard's Carter/Edel book is completely wrong. There is a pic on p. 10 & it is of a later 9000 series carb, & it is NOT a 71 model. Shepard claims the 71 has one large rear fuel vent. It doesn't. It has two at the rear, & the front vent uses a casting projection for the vent, not a steel tube.