Please Help

[69ChevySB]

Hi there folks, I have a 1969 C-10 Shortbed Chevy with a 350 (or maybe it's a 327, how can I tell?), 3 speed on the floor, and I have a 6 bolt pattern on my wheels. I have a few questions if anyone would care to help:

1. How do I tell if my motor is a 327 or 350?

2. How do I tell what kind of rear end, or what gear ratio I have?

3. Why is my bolt pattern 6 bolts instead of 5 I thought 6 was only for 4 wheel drives, and mine is a C-10 (2 wheel drive). Does this have any affect on the performance of my truck? does it make it better worse?

4. When I am going down the freeway or highway my rpms are really high it seems like when I do 80-85 my rpms go way high like 4000+, is this not good and what should I do to prevent this? should I get a automatic transmission?


All help would be appreciated, Thanks!