Latest 4 cammer even had Turbo....
1963 Indy engine (very early)
The Fairlane 260 was used as a basis.
Also because the developers saw the potential and it was also the engine nearest to the 4.2 litre limit (256.2 cubic inch)
Alu block
alu heads, basically like stock(design). larger valves etc..etc...
3.76 bore compared to 3.80(stock)
Same stroke....
Forged billet crank,standard rods,dry sump and the recently developed transistorized ignition.
180 exhaust, wich showed inproved extractor effect particulary beneficial in mide range torque.
Gasoline and webers proved in favour of carb/alkohol and hilborn injection.(desicions not jusp HP factors mind you..)
The pushrod engine were favoured over the twin cam heads at the time...
Problems that were taken care of:
Pistons
Head gaskets
Valve gear
Carbyration
Installation
48IDA, then 58”IDA”´s were chosed as being given best results
They got it running very well.
Some mods, got into production 289....
And into some 221, 260 mods too...
Even the Y blocks got some...
Then came
1964
Further developments(ongoing developments in detail took it place continously of course..)
Injection, 4 camm.
Very similiar to -63 blockcastings, from revised 289 fairlane patterns....
Up to date and further developments and mods resulted in the Late small block GT40 engines, TransAm tunnel ports, 302W,Boss 302s etc etc...