I agree with the list here, a 400 is no replacement for a 413. If you had to do anything, go for the 440, you can get them rebuilt fairly cheaply compared to the 413. plus, both a 440 and 413 are RB big blocks, the 400 and 383 are low deck designs, so the 440 would at least "look right" in place of the 413. ===== --Mike Pittinaro One point eight litres Stromberg carburators sing Loose nut at the wheel __________________________________ Do you Yahoo!? New Yahoo! Photos - easier uploading and sharing. http://photos.yahoo.com/