Just test-fitting engine in the tub. Note: you must use 1/2" long isos on the mounts in this tub. The engine slides right in nice and snug between the tub sides...perfect!

Also because of the height of the tub behind the engine and how low the engine sits, the use of a 90 degree pipe setup is required. Pictured here is a CC Racing Powermaster pipe on a standard 90deg 1" dia header. This is a big pipe but it clears the tub side. The steel pipes have even more clearance.

Installing the ridepads on the sponsons.

Drilling boom tubes for proper sponson spacing. I use spacer blocks pre-cut to proper length to get them all the same.

Pictures of the finished boat are here: www.modelgasboats.com/forum/28...lly-done/#15836