1969 Barracuda 318 to 408

[kevabe]

I am looking into buying a chrysler 408 crate engine from summit racing. I currently have a 318 in my 1969 barracuda. what would I need in order to make this conversion? would my current automatic transmission work with the 408?

 

[70aarcuda]

flexplate...is the motor externally balanced?,,,then you will need a b&m flexplate for a 360...

yes..you can use the 904 trans in the car....

 

[damnimcooltom]

I would suggest that you beef up the transmission, and if you have a 7.25" rear axle, I'd look into replacing it, too. As far as bolting it in, as 70aarcuda said, probably a flexplate or correctly balanced converter, and a different driver's side motor mount bracket.

 

[2 Darts]

You'll want to open up the exhaust, too. Suggest dual 2¼ or 2½ inch pipes. Although the 340/360 A-body exhaust manifolds breathe better than those on your 318, they are hard to find and pricey when you do. You may be better serve $ wise and performance wise with a good set of headers.

 

[fishman]

I'm in the process of doing the same thing on my 69 cuda. I did as suggested above, changed the rear to an 8 3/4 and trans to a 727. I'm using headers on a 408 that I built. If all goes well should be running soon. If I can help on some of the little stuff let me know.

 

[stroked 340]

And if that stroker puts out any real touque be prepared to start breaking things,been there done that..but i've fixed all the weal links in my drivetrain..