[67C10Step]

Your valve covers look to be the same as the stock covers that were on my 283. I went and measured the height from the flat on the top to the flange at approximately 2-3/8".

Also, a few more photos of the alternator position. My engine has a 6-3/4" crank pulley and not knowing what size is on your 327 suggesting a belt would be difficult. Also, I ran a string along the topside of my upper bracket and it measures approximately 14".

Not sure if any of this helps but hope it does some.