I have a 1960 Chris Craft with a 283 and need some heads. Having a hard time finding 283 heads, will a 307, 327 or 350 set fit correctly on the 283?

These are straight plug, (194's?) I think.

I'd also like a carb. for the same, does Holley make a 600 CFM, mechanical secondary to replace the Carter I can't get parts for?

Thanks.