SBC lacking power

Hi,

I am hoping someone can help shed some light on my current set-up. I know this has been raised a lot on here before but I couldn’t find anything that really gave me an answer.

I have only just got my 66 C10 with a 350 on the road and it feels like a bit of a slug/like it is still a stock motor (before all the upgrades happended). I have measured the 0-100 and its around 10 seconds (shifting manually on the TH350) which is slower than my 1.2 litre Volkswagen Polo and from a rough calculation would equal around 150 hp at best. The engine is as follows:

• Stock bottom end – standard bore and compression test is all within 4% of each other
• New alloy heads with 195cc runners, 64cc chambers 2.02 intake and 1.60 exhaust which are a little big but looking to go a 383 in the future. Flow numbers are:
• Lift Intake Exhaust
  200 145 106
  300 192 135
  400 232 160
  450 242 168
  500 242 178
• XE262h cam – Was a comp cams kit with timing chain, lifters and springs
• Edelbrockperformer RPM intake
• Brawler 650 carb (brand new) vac secondaries
• Flowtechheaders – 1 ½ primary, 3 in collector but runs a duel 2 ¼ in exhaust to Flowmasterstraight through mufflers
• MSD StreetfireHEI distributer – new MSD leads and spark plugs
• Initial timing is set at 14 degrees and total 34 degrees (all in by 2800 rpm)
• Stock TH350
• Stock Converter
• Rear gear ratio 3.73
• Rear tire height is 28 inches

The car starts, idles and cruises perfectly and sounds strong but just doesn’t seem to have much go at all. The plugs are not fouling or over rich or lean. My question is whether I am just expecting tomuch out of the engine (although looking at the dyno sheets from comp cams for the cam I am not) or whether it sounds like something is a misssomewhere? While I feel like it would benefit from a looser converter I don’t feel like this would change the accelationthat much.

I have ordered a cam degree kit to check whether it has been installed retarded and is the correct cam. No loose lifter and pushrods spin when cranking so don’t think I have wiped a lobe.

Hopefully I have provided enough info for someone who knows more then me.

Thanks,

Jamie