Jantrix, If you feel like the AMT/Ertl Plymouth Duster's 340 engine is too small overall, then I'm afraid you'll be disappointed with the 355 engine from this Cushman kit, too. I have read several forum posts and some kit reviews that state that this 355 engine is on the small-side, too. My best suggestion for you; take a good look at Bob's 4th picture in his very first post here. My thoughts; I'd hafta agree, this 355 engine looks a tad small to my eye, too. (But I'll still be building this kit because the subject matter is just so good!)