Central Coast Mustangs has a good deal on a long block right now. GT 40 Cast Iron heads,
all new parts etc..I think it's going for like $1900, $2100 with roller rocker arms. You will spend more than that if you do it yourself. You will gain a lot of knowledge however, if you decide to build a motor on your own. Plus, you know exactly what you have and how well it was put together. You cannot beat the experience of doing it yourself, if you like to wrench that is.
Good luck.
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