My Dad was concidering putting a Th400 into the '63 Riviera until we found out how much fun it would be...so now the question is how hard would it be to drop a Buick 455 in that engine bay?

The problem is the tranny needs rebuilding and no one in the area (N.E. Arkansas) will touch it and that heavy **** block of metal is still in the car...yes we fought with it before to replace seals.
I picked up a '73 455 and a Th400, so the engine/tranny is available.

Here is what I know about the 455

23" Outside of valve cover to outside of other valve cover
28" Outside of exhaust manifold to outside of other exhaust manifold
30" Height from bottom of sump to top of air cleaner
30" Height from bottom of sumt to highest point on intake manifold
27" Height from bottom of sump to top of Carburetor
29" Length from rear mounting surface to water pump pulley
22" Length from rear of intake manifold to water pump pulley

http://www.wagoneers.com/FSJ/tech/En...swapchart.html

But I don't have any info on the Nailhead and I'm not near enough (3 hours) to measure it myself...Dad's an OTR driver and is rarely home (he said that retirement is 9 mos away).

Any suggestions?

Wayne S