1974 doge dart sport

i have 340 blocks date codes range $300 for a block that will make 30 or 40 over i have three standard bore blocks that are like new 400 each i guarantee that they are not cracked i have a bunch of manifolds so let me check years and i might have the carb the only thing i have as far as 4-speed stuff is a lakewood bellhousing used but has been powdercoated red thanks josh