Weight of stock 1934 Ford 2461 - 2684 lbs Weight of Ford V8 - 525 lbs Weight of Chev V8 - 540 lbs So, if you say 2500 - 2600 lbs you won't be far wrong.
An original weighed 2538 (ref http://www.socalefv8.org), you might knock off 100 pounds for the engine. Charlie Stephens