V/C interchange No, The 350 V/C will not fit the 340's 350 have 6 bolts 340 uses 4 blots But all 215, 300 and 340 will interchange - offy makes some nice finned Alum. V/C. There are 2 style of stock v/c - early 61 though late 66 which look like Nailhead type v/c and the 66-7 flat type with ribs that makes it look like sbc's later