71 c10 just feels slow. Ideas?

[Slammed71C10]

I have a 71 c10 long bed. 355, flat top pistons, 9.5:1 compression, ported/polished/3 angle valve job 882 heads, large cam(can’t find my spec sheet for some reason), air gap intake, Edelbrock 600 mechanical carb, and a ford 8.8 with 4.11 gears. I’m really poor with timing so I had my neighbor do it with his timing light. Truck idles and runs excellent.

The problem. It has a th350 transmission 3000 stall with the 4.11 rear gears. I take it out and it just feels so slow. Takes off great, has good power through 1st, but as soon as I slap it onto 2nd it just doesn’t seem to have as much get up as it should. I have a 94 integra show car that feels faster with a pretty stock 4 cylinder. Am I missing something? Are 355s just slow or am I doing something wrong?
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