Can someone please tell me how I can tell if my 1965 Bel Air 327 has 250 or 300 HP? Thanks all
If the engine code stamped on your engine pad is HA or HC, it is the 250HP (RPO L30). HA is manual trans and HC is powerglide. Also, if it is HB or HD, it is the RPO L74 300hp option. HB is manual trans and HD is powerglide.
I'm not 100% sure but I believe 65 was the same as 66 and the only 327 available was the 275 h.p. It was 275 h.p @4800 rpm, 355 ft.lb. @3200 rpm with a 10.5 :1 compression ratio. It was equipped with a 4 barrel. I don't know if it was a Rochester or Carter.
327 / 250 is low compression (8.75:1), small valve (1.74 / 1.50), 929 (standard hydraulic) camshshaft. 327/300 was high compression (10:1), 461 camel hump heads (1.94 /1.5), 929 camshaft (standard hydraulic) camshaft, & dual exhaust. 327/275 Is same as 300hp, but with the dual exhaust as an option.