1959 1/2 ton Apache with a 261 engine, Last year I changed one on the drivers side of the engine. Today the second one on the same side is leaking, so I removed the manifolds and will install a new one tomorrow. Here's the million dollar question, It's been 14 yrs since the engine was built, should I pull the transmission, flywheel and bell housing and replace the one behind the bell housing? I'm thinking it would be in my best interest to do that, I know it will entail a lot of work but I do drive this thing a lot and would not want to spring a leak out on the road. Question number 2 is, the plug kit that I have has 2 concave plugs and one regular looking plug that look to be the same size, they are all larger than the ones on the side of the engine. I know I'm assuming the regular looking one, goes behind the camshaft. So that would mean the concave one would be the freeze plug for the center of the block. Am I correct with my assumption? Any words of wisdom?
Thanks
