1968 '340' Barracuda vs 1968 '383' Road Runner

69 Cuda 440 said

EL5 Demon 340,

No the NHRA dd not refactor the 340 to that high of number.

It was 310 HP.

That I know for fact, as we ran several 340's from late 1968 thru 1976.

The 1968 thru 1971 #3100 lb. 340 A-Body cars all fit into the {10.00 - 10.49 Wt/Hp} Factor.

* 1968 = E/S or SS/F
* 1969 = F/S or SS/J
* 1970 = G/S or SS/H
* 1971 = G/S or SS/I
* 1972 = SS/I
* 1972 = SS/I
* 1973 = SS/I
* 1974 = SS/I
* 1975 = SS/I
* 1976 = SS/I

Note; In 1968, SS/F was from .........9.50 and up Wt/Hp
Note; In 1969, SS/J was from..........10.00 and up Wt/Hp
Note; In 1970, SS/H was from..........9.50 and up Wt/Hp
Note; In 1971, SS/I was from..........10.00 - 10.49 Wt/Hp and stayed that way.

Click to expand...

No i didn't mean 340 horsepower, i meant in 1971 the nhra refactored the HP number up to 310 due to the better intake and bigger better flowing TQ carb. the 71 340 engines had more HP than the earlier 340's buy a little bit maybe 10hp, and a lot more than the later 72 and on low compression small valve head 340's. Also wouldn't take NHRA numbers as the bible, they were just tring to get classes set up and make money!! Also there was a lot of sloppy machining back then, when i took out my 383 for a regasket i was expecting to find the factory 10.1 pistons about .020 down in the hole like so many other guys have said theirs were. but i was surprised to find one side at zero, and the other side starting at about .002 under at the front cyl and buy the back cyl .010 down. (theres that sloppy machining!) so if i had to guess the 383 in my RR was a better faster running 383 than one of the ones where the machining was worse and the pistons were down farther in the hole.