It sure is!

And yeah, some spacer plates made from basic lumberyard 1/2 and 1/4 plywood could be made up and varnished with some polyurethane varnish to oil proof them and make the model balacing a lot easier.

Some may suggest using tubular spacers on the longer bolts instead of a plate to space the engine forward. I don't like that idea since the four bolts and spacers are basically unsupported. For up to maybe 1/2 inch it would be OK. But any more than that and you've given yourself a source of some possible nasty vibration. And those big gas engines shake like a paint mixer already ! ! ! !