71 Duster 360 (new project)

Did some diagnostics on this motor this afternoon......First thing took all the plugs out......then ran a compression test...and checked the valve lash....

Pretty much found out what i believe the problem is/was in the 1st few minutes...NO 5 plug gap was closed...not firing.....Compression were all dead on....and valve lash again...where they was suppose to be....

Figuring this 408 with Ported Eddy heads from IMM with 11 to 1 compression...and eddy victor...MP590 cam,,,,looking at everyone posted dyon hp on Facebook...should probably make 650 hp...LOL
So being realistic ....I say 500 hp....so we were down one cylinder...just over 60 hp.....so launching like a turd would be expected.... Going to put the valve covers back on tomorrow ...check the oxygen senor....and back in the trailer...