New engine help

[cb1965]

alright guys heres my issue.
i have a 65 chevy with a beat up 350. its basicly a parts engine witch i figured out when i took it appart to clean it. the block is from a 70 car, heads are 76-85 truck, i think. intake is a 68 truck. 2 barrel rochester year vehicle ??? who knows. i tried to make it work but now the valve stems are bad and rocker nuts keep loosening. block is bored .40. im tired of messin with it. srry for the rrrrrrrant

point is i want to drive the heck out of it but right when it seems to be good something new happens.

what is a good crate engine that i can drop in and go for a good price. i want it to be a DD and not looking for anything fancy. i have the original powerglide still attached. thanks in advance

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