Low RPM harms for carbureted car?

With ford pinto engine, my car user manual says, don't drive your car with low rpm.
And there's most efficency area on RPM gauge from 2500 to 4000. Like we all see in bus or trucks.
max. Torque @4000 rpm

so if my car EFI, i can say high gear low rpm brings economy but with carburetor i can't say anything.

should i use my car around 2500rpm in urban?
any experience with ford pinto weber carby engine?

What are some good first cars? - 1

I'm 16 and I want to get a car. I want something unique. Something when someone I know sees it going down the street, they'll know it's me. Here's some cars I was thinking of.

-1988 Merkur XR4Ti
-1991 Ford Crown Victoria Country Squire
-1994 Mazda Navajo
-2002 Lincoln Blackwood

Which one should I get? What other unique cars should I look at?

2000 Ford Windstar O/D off light flashing?

2000 Ford Windstar O/D off light flashing?

Added (1). I have a 2000 Ford Windstar SEL. About two days ago, while driving, my "O/D Off" light started flashing, along with a message that says "Check Transmission". The vehicle is running and shifting just fine, my question is, what could the problem be, and will it be ok to drive for a while until I have the money to take it to a mechanic?

I have a 1998 Ford E 150 making a loud ticking sound?

I believe the head gasket or head gaskets are blown this problem has been going on for about a year when it first happened I put a couple of bottles of Blue Devil in it and it seemed to stop the antifreeze from going in the oil at this time there was no ticking sound but recently the same thing happened again antifreeze in the oil but this time there's a loud ticking sound if I change the oil and head gaskets and put a bottle of Lucas in it as I always do when I change my oil will this stop the ticking sound