Good cheap 383 builds??

Ports on 346 are essientally the same as 452. 452 has hardened seats as Strokerscamp has mentioned. I have heard that some 346s had hardened seats and some didn't. Don't know if this is true though. Both of my old big blocks have iron heads (906 and 346), but were built prior to the availability of the Edelbrock heads. If i were building the same engines today, i would go straight for the Eds or the Stealths. If you are trying to get by on the cheap for now: use the 516s you have and throw on some new springs,cam in the 225 to 230 at .050 range, Performer rpm intake ,750DP or 750VS( i like DPs better), and some cheap headers. If you get a MP windage tray, spread the slots open more with a screwdriver or something. The real key.... a good converter. The converter can make or break the combo.