ThxAssuming your 350 is a gen 1 and not a later model factory roller block then everything should swap over but most people drill the heads for steam holes when they are going on a siamese cylinder 400 sbc block.
What exactly do steam holes doYeah just don't forget your steam holes and you will be fine.
For me if I buy a top end kit from trick flow would I have to make the steam holesAlso the flexplate and balancer can not be swapped over from the 350 to the 400.
You would have to contact them but I would assume they do not come with them but maybe they will drill them for you for a small fee.For me if I buy a top end kit from trick flow would I have to make the steam holes
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