Ive heard said once " If he (the seller) says its a 383 stroker, its a 305. If he says its a 400, its a 350" I have actually seen this happen, but not always accurate. The guy can say its a built 350 all day and that doesnt mean squat. It could have come from the junkyard with 250k miles, gotten new rings and bearings, and is now "built"
haha. yeah this kinda happened to me. Seller told me it was a 305 but it was really a 350.
It took me almost a year before i found out.