Check out my car and talk to me about 318/340 swap

jrjones said
You gonna bolt that up to a 904? I figured anything bigger than a 340 would really need a 727 sitting under it.

Negative ghost rider! That’s an Old wives tale.
HP level dependent, you Might! ….might have a point. If there dead stock transmissions coupled with a really high HP engine. The 904 can be built up as well as a built up 727.

Perhaps one day this BS (Old Wives Tales) will stop!

Dartswinger70 said
The factory put 727 behind the 340.id say a 904 could hande it on the street. if 1/4 mileing it all out full throttle then yes you'd need more beef. i am thinking these days the auto guys have figured out how to beef up the 904. However traditionally the 727 is the heavy duty unit for sure.

When the 904 was introduced, the Pro Stock racing teams of the day had to drag the officials down to the dealerships and physically point out that the 904 was the stock transmission. Running into the 8’s with a 904 can be done when it is properly prepped.