OK, I was at P.A.P. again today and took a survey of 4 barrel manifolds in ford vehicles. Here is what I found:

first row of fords (short row starting from west) orange/white truck - 460
second row (first long row) dark blue van - 460

second row 2-tone green truck - 360/390

second row 80's truck - 351 (matching air cleaner laying on ground)

third row dark green '79 reg. cab - 460

sixth row brown/tan '79 x-cab - 460

Go get'm!