I used the directions from Bigblockdart.com to modify a 73-76 spool k frame and it worked out perfect.Stock engine mounts with shumacher headers and the 440 fit like a glove. Make Your Own DC-K Frame
With the shumacher headers the driver side plugs are easy,pass side the 4 and 6 are tight and a pain to get the boots on and even harder to get the flame retardant sleeves on.