305 topend rebuilding

[stepside86]

My 86 305 shoots out a puff of smoke on every start up. I was told the heads need new valve seats to correct this. My father said that if I only get the heads done they will cause oil to come through the piston rings. Is this true or can I just do the heads? Also any tricks to cleaning an intake manifold? I heard soaking it in diesel fuel cleans it. I don't have enough money to take it to a machine shop. Thanks in advance to anyone who can help me.

[stepside454]

you dont need to get the heads done...just have new seals installed

[RSBAD454]

you can have new seals intalled, but how many miles are on it? Don't just bandaid the problem, do it correctly. Cleaning the manifold will require castrol super clean and a bead blaster.

Toys are my game