what to expect from this set up?

[CB]

for street use build:

'70 340 engine rebuild:
block is .040 over
cleaned, bored and honed
KEITH BLACK hypereutectic flat top 10.5:1 pistons
sealed power file-fit MOLY rings
stock steel crank .010/.010
fully reconditioned and balanced rods w/arp bolts
new cam, rod and main bairings
ISKY .450/.450 lift hyd. 264-MEGA CAM
"U" heads w/340 HP OEM springs less 2.02/1.6 valves
performer RPM intake with proform street series 650 cfm carb (or 750 cfm?)

rebuild 727 TF with 1800 stall / open 3.23 rear axle ratio / power brakes

full TTi system

so what should I expect when I drop this engine/exhaust in my car? (options A/C , P/B , P/S )

What would you change on this set up?
thanks CB

[firefighter3931]

That is a very nice combination for your car CB....it'll idle nice, make lots of vacuum for power brakes and be easy to tune. Plenty of power too ! 

I would use TTI headers and a 2.5in exhaust system with an x-pipe and a good straight-thru style muffler....magnaflow or ultraflow. 



Ron

[CB]

should I run a 650 or 750CFM carb?
stall speed is 1800, propper stall for this set up?
3.23 ratio, better then 3.55 or 3.91 gears?
thanks 
CB

[firefighter3931]

The Proform carbs are bigger than advertised.....that 650cfm PF carb will flow over 700 cfm so it's ideal for this 340. The stock converter will match up well with that Isky cam. With the taller tires the 3.23 gearing will be a little on the small side....i'd prefer to run a 3.91 with a 28in tire for more torque multiplication and fun. 

You could try the 3.23's and see how you like it....then swap in something (deeper) later if you want more off the line acceleration. 



Ron

[Finn]

I didnt see anything for chargers from magnaflow, do you have to piece it together yourself or did I miss it on the website?
And speaking of gearing, what can you expect top-end and mpg wise in 3.55's vs 3.91's?

Mine came with 3.23s and I cant decide what to do with them. I want the car to be quick off the line but I also don't want it be screaming and chugging gas at 70 mph.
I was recommended 3.55s...
Any opinions?

A little background info on the car:

440, Edelbrock performer rpm pro-flo2 EFI system (35lb injector)
Hooker ceramic coated/tuned headers. (link: http://www.holley.com/5209-1HKR.asp )
727 trans

[speedfreak68]

heres a site for the top end @ different gears but as far as mpg I don't know what to tell ya
http://vexer.com/68rt/speed.html

[73charger528cid]

mine has 3.91s with 26" tall tires 3500rpms to keep up with traffic I live in mass. so thats about prob 70mph.

you should see the looks I get shes quite load with a 3" exaust.

[Finn]

3500!!! 

Well I think Ill be sticking with the 3.23s for awhile lol.
Thanks for that site too speedfreak68, cleared a lot of things up for me.