Trade a 350 for a 454?

[MARKDTN]

There's a reason that he wants out of it. An '81 454 is a boat anchor(230HP/360torque). Myself there is no reason for a big block anymore (unless you are restoring something that had it) but no way I would swap one in. You have to deal with mounts, exhaust, cooling, springs.... Would you get his exhaust manifolds and all accessories? If you have a/c the compressor is probably in the wrong place and you would need BB brackets at a minimum or might have to change the main hose. Edit-I see you have a BB already so that would help a little.

If I wanted big power, fuel injection is the way to go and will give you BB power on 6-cyl economy-and much easier to cool. TPI on a stock 350 bottom end will really wake it up. a '91 Corvette was 250HP and 350 torque. LSx swap . A 5.3 is 285 to 295hp and 325 to 335 ft-lbs torque depending on year. A 6.0 is 300-367HP and 360-380 ft-lb torque depending on year.