I have a 4.0L HO. No real mods just routine maintenance. To commemorate the 300K mark I put a new timing chain and oil pump on it. To my knowledge, they were both the originals. The head is from a '91 cherokee but at the time I did the swap it had more miles than my Wrangler. I only did the swap because I needed to drive to school so I had it at the machine shop during the week and over the weekend it was an easy bolt and unbolt.
My secret is I buy whatever oil special they have at A-zone or O'Reilly's. Before Walmart had the cheapest oil (SuperTech) but now its just as much as the cheaper autoparts store brands.
How far is Buffalo from Niagara Falls? I have an unexpected trip to Simcoe, ON tomorrow for work and I'm picking up a rental car and driving to Simcoe. Any cool places in the area to go or eat?
Buffalo is about 1/2 hr or 40 mins from the Falls on the thruway depending if you have to go clear downtown or not. You can get the *original* buffalo wings at the Anchor bar on North street in Buffalo - its the place that actually invented them! North street crosses between Main and Delaware downtown Buffalo.