head id

[wlf89]

does anyone have a link to a place that show the head casting marks like the double hump marks and etc. my brother bought a place and it has an old 56 chevy school bus on it with a motor im gonna buy and put in my truck trying to find a little info on it the suffix code is cjd which tells me CJD 71 350 Chevelle 270 hp L-48 TH 350 4-Brl Hyd Cam just wondering if i has the original heads for that motor or been switched i can get a pic of the head mark in a day or two