Hi guys, just wanting some input on an estimated HP number for my 272 y block. I will be getting it on a dyno in the next 12 months to get tuned up and get actual numbers but just curious on your thoughts.

It’s in a 59 f100 with t98 4 speed. Only done a couple hundred miles since rebuilt. It feels strong and punchy with the 3.92 gears in the rear

- 272 block bored .020 (275ci)
- Stock 3.30 stroke
- Decked block (pistons level with block)
- CR around 8.5:1

HEADS (ECZ-G)
- SBC 2.02 intake valves
- probably only .005-.010 off the heads to clean them up
- New guide inserts and positive seals
- New valve train 1.54 ratio rockers
- 95lbs valves springs

Cam
- Y270s clay smith from Mummert, 108 LSA, duration 224 IN/EX @.050
- 0.446 IN/EX with 1.54 rockers

Intake/carb
- B intake machined with 2x oval slots
- 2inch 4 hole spacer
- Edelbrock performer 600cfm vac secondary’s

Ignition
- Msd ready to run distributor
- Msd blaster 2 coil
- 8.5mm wires
- New plugs
- All in at 3000 rpm
- Can’t remember the curve but I think I used the light blue and light silver springs and a different stop

Exhaust
- Patriot headers 3inch (not sure about tube size)

Probably left something out.



Thanks, Dennis.

56 F100 - 272 Y Block
NSW, Australia.