hi all, i bought an 82 F350 LWB which has a 460 bb my old man who's a mad ford boy said he's sure it's a 351

where can i find the engine number vin# plates seem to be confusing no engine#C on vin# i found this # behind water pump on block....F....JG34?A..83816K any help will be most awesome i dont own a holden hahaha