Sullyvette

Hi All, looking at a 1965 327, 4spd conv. Air cleaner has a 300 HP sticker, duel snorkel. current owner thinks it's a 250 HP motor. Vin # checks out OK. Colors correct. Block # provided is 3782870. Number just above that is partially obstructed. How do I or current owner figure out the real HP of this motor? Thx, Chuck
518-858-6419

Bluestripe67

Look at the stamp pad at the right front of the block where the heads meets the block. It's flat and should have the vin and the engine code. The end of the engine code should be HE for 250hp, HF for 300hp. Dennis

65GGvert

Is the date code and engine suffix still on the stamp pad on the engine? The 250 horse originally used WCFB carbs.


HE .. 327...250 ..WCFB 1x4BC & ManualTrans.
HF .. 327...300 ..AFB Ix4BC & ManualTrans.
HG .. 327..375 .. FI, Hi-Lift Cam & 4-Speed
HH .. 327..365 . Holley 1x4BC, Mech. Lifters, 4-Speed
HI ... 327 ..250 .WCFB 1x4BC, A/C & ManualTrans.
HJ ... 327..300 ..AFB 1x4BC, A/C & ManualTrans.
HK .. 327..365 . Holley 1x4, Mech. Lifters, A/C, 4-Spd
HL ... 327 .365.. Holley 1x4, Mech. Lifters, T/I, 4-Spd
HM .. 327.365 . Holley 1x4, Mech. Lft, AJC, T/I, 4-Spd
HN .. 327 .375 . FI, Hi-Lift Cam, T/I & 4-Speed
HO .. 327 .250 .WCFB 1x4BC & Powerglide
HP .. 327 .300 ..AFB 1x4BC & Powerglide
HQ .. 327.250 .WCFB 1x4BC, A/C & Powergl

Sullyvette

Thank you for your quick response. In the process of checking. Chuck

MikeM

The main difference between a '65 250 hp engine and a 300 hp engine was, the 300 used an AFB carb and the 250 used a Wcfb.

Not much need to look any further than that.

MikeM

The main difference between a '65 250 hp engine and a 300 hp engine was, the 300 used an AFB carb and the 250 used a Wcfb.

Not much need to look any further than that unless you're interested in originality.