couple questions from a new guy

[bradw]

OK New to this forum , I have been looking at several Chevy/Gmc trucks for a daily driver..
Couple simple questions .
I was looking at a 62 with 350 vortex/ Turbo 350 with 4.11 rear end.
Seems to start right up sounds good but Owner says motor runs 3500rpms at 60mph claims it cause the turbo 350 and 4.11 rear end are not a good combo for this motor??
IDK I have had few V8/turbo 350 set up and never had this issue..
What do you think??
thanks
brad

[19GMC63]

According to http://www.f-body.org/gears/ with 29" tires, you would be running ~74mph @ 3500rpm, assuming it truly has 4.11 gears.

[bradw]

so the speedo is off or is thier something wrong with the truck?

[markeb01]

Welcome to the forum. That’s not a bad combo for the engine, it’s just a bad combination for economical driving at sustained freeway speeds.

I’m running 4.10 gears in my 1960 with a 4 speed manual, and 29” tires and spin 3000 at about 60. Using the same calculator site I just drop my tire diameter to 28” to make up for the true rolling radius, and it calculates out to 61 mph at 3,000. The extra 500 rpms is lost in the torque converter. He is probably correct in his statement. For me the setup is ideal, because all of my driving is around town and I almost never take it on the freeway. Whether this is a good fit depends on how you want to use the truck. If it is a good bargain but the drivetrain is a bad combination, it’s a matter of putting on taller rear tires, changing the rear end ratio, or putting in an overdrive transmission.

[bradw]

ok that sounds like some good advice , I need to commute to work on the freeway, but $800 for truck is a good deal I think
thanks