Hello, I stumbled across your site while researching SBC questions. I am not sure if this would be qualified to post on this type of forum, but it is a SBC 350 that I am dealing with. This engine I am trying to get running is in an older boat. We have installed 2 reman long block 350s, one is standard rotation and the other is reverse. We had both engines running out of the boat. We dropped them in the boat and now one will not start. It tries, stumbles and nothing. I figured a 350 is a 350 no matter what it is installed into so hence why I am here and hoping someone can help me. I am out of the US so there is no one here that can help, just the internet . We have new reman Rochester 4 barrel carbs installed, new distributor, plug wires, plugs, coil, and fresh fuel. I am just at a lose with this thing. It seems so simple, but what am I overlooking. I have verifed my timing by bring #1 up to TDC and my timing mark on my damper matches the front cover mark at 0. Also had a nice puff of air on 1 and set my distributor/cap dead on 1. I got it fire and start just for a second or two twice with new plugs, but this makes no sense. If I am fouling plugs why? This is a reman long block. I know they recommended special oil, but we can not get the oil the rebuilder suggested here. I called and told the only oils we can get, a synthetic 10w/30 blend oil. The builder said he did not think it was the best, but better than nothing. We ran this engine for about 25 minutes to set cam bearings and it seemed fine. Good oil pressure, temp was good, sounded good. (Actually have video of it with gauge readings). I did set the timing just before shutting her off to 10 BTDC. I have tired to turn distributor CW just a little to help it start easier, but makes no difference, will not start and stay running. The other engine I could get to run in boat. So I switched the carb from this one to the non runner, nothing. I can give a pump of fuel in carb, so I know its getting fuel, I can see it. I am going to try to make some videos of my timing procedure, spark quality etc. Maybe I can share a link here, not so sure it will work. Really could use some help with this SBC. Thanks for any and all input.