If you are unsure of your mechanical skills, I am not sure about how you will make out with an engine swap. How are your fabrication skills? Can you weld? Do you have a welder? The swap you are proposing is not a common one and will require some innovation in design and determination in execution on your part. Not saying it can't be done, just that it will be a challenge. Lots of people have attempted similar conversions, some have achieved their goal, most end up for sale on Craigslist as an overpriced collection of parts, half-cobbed onto a chopped-up chassis.
Grab a beer and spend a week or so reading the posts in this section and the Big Block section to get an idea of what you are getting into.
The easiest conversion would be a Big Block kit from Cart Parts Plus (CPP), one of the sponsors of this Forum. Everything you need in one kit, and technical support as well. Could be cheaper than either rebuilding your old engine or fabbing in a snowmobile engine, reliable and easily modified if you want even more power or speed.
Oh, and welcome to the Forum!
