I am having a bit of a prolem with my truck, it just doesn't run like it should. I have dinked with engines for quite a few years, but I am by no means an expert. I bought the truck with its current motor and trans, so I am not 100% on some of the specs. But here it is, 67' 327 with what sounds like an RV cam, brand new(not rebuilt) Holley 600cfm w/ vacumm secondaries and electric choke, Holley dual plane intake, GM HEI ignition, and dual exhausts, no headers, also with a TH350 trans, 411 rearend(open). Here is the problem, it idles in park and neutral fine, but when you put it in gear it all but dies. To make it idle in gear the idle mixture has to be set very rich. The timing is set at 16 degrees advance at idle, and with a shorter mechanical advance overall. Thats not the only problem, since I have had it, it has poweer issues. Even with the open 411 rearend, from a stop, with an empty shortbox I can not even break a tire loose. Pretty sad I think. Everyone who has owned a 327 can't beleive it. By the way the motor revs and run great in park, and has good compression, but when I'm driving it lugs its way up to speed.