350 / 305 head combo (what am I leaving on the table)

[Whitfield]

Head casting numbers:

462624 ‘76-’78, 305, 58cc chamb, 1.84/1.50 valves, hardened seats, accessory bolt holes, best of the 305 heads 1.84/1.50 valves and ports too small for large cid; accepts 1.94/1.60 valves & seats

Block casting numbers:

14010207 Not sure ~ googled it and came up with ??? 4- bolt main / Truck block ???


Sold as a Take out 3K miles motor (Jasper Remanufactured) from a used Corvette purchase. New owner wanted more power and went with a speed shop built 450hp 350cid.

My intended use is in an early 80's inboard Competition Ski boat. 90% of the time I am pulling skiers at a snails pace 1800 rpm to 2800 rpm. Realistically what am I leaving on the table with the 305 heads (I'd guess top end RPM)?

What would be the best place to spend any extra $$$? I picked up this clean reman for $450 so I have some room to move. Vortec heads always seem to be highly recommended, but I think my application would classify as low rpm in the Hot Rod world.

Wish I understood more about piston / head / squish / cam design and relation to power performance, but sadly I do not.

This will be set up counter rotation, with appropriate crank seals / reverse cam / and stainless head gaskets. My last motor was a 130K miles 1990 Suburban take out ~ converted quick and dirty to reverse rotation. Still runs ok, but low comp on 1 and 5 + it uses too much oil.




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