440 from an rv?

I have a '74 Winnebago 440/727 in one of my cars. Both slipped right in. The transmission was a regular A/B/C/E body style. Heads are probably 452's (they are on mine anyway). I definitely wouldn't say 906's are the best heads. They only flow marginally better than 452's or 902's, if they flow better at all, and the 452's and 902's will already have hardened valve seats.