Newbie 318 piston question

Dartswinger70 said

318 can be fun when trying to figure this out always seems to be a hurdle though with the LA 318
1. The block cant be bored to 4 inch
2. the down in the hole pistons with pressed wrist pins and somewhat limited selection of pistons
3. the heads
4. the compression ratio in general
5. the low rpm powerband

Click to expand...

1. Some can, early car & 318-3 truck blocks are supposed to have slightly thicker bores but I would sonic test before boring to 4". My 73 block sonic checked pretty good but I opted for a +0.060" bore so I could rebuild it later at 4" if I keep it long enough.
2. Swap the pistons and bush the rods to run floating pins? Or swap the oem rods for aftermarket rods with bushes & upgraded bolts in them already.
3. Speedmaster heads are cheap and good for around 250cfm out of the box. 63cc chamber
4. See 2 & 3
5. Put a different cam in it?