On a 73 Riv, "Stage1" (yes, has vin W); How can I tell if it is the original engine? and trans? Trans should have the vin # on it too, right? Chrome egine pieces; Should the valve covers be chrome this year? or only the air cleaner top? and what about carb#? and distributor #? Are they the same as regular (vin U)? or different? what else should I look for? Thanks!
Look for XA or in my case XFA (between exhaust# 5 and 7) on your engine block, if you have a Stage1 Riv with the "W" vin#. For it to be original look for the serial# in the block stamped near the timing cover on the right. Yes Tranny should be a BT and also carry the serial# its on the drivers side of the tranny just above the oilpan. My Stage1 Riv actually has the Stage1 7043242 carb, never seen one for sale on Ebay. Too bad the distributor had been replaced once so dont know if that could be Stage1.
Yes,U is for standard 455 and W is for Stage1 in '74. The '74 Stage1 also was standard with High Energy Ignition while optional on other 455's. I have a triple black '74 Riviera W code Stage1 option,but no GS option on it. It is a parts car-severe rust in the 1/4's.