Okay heres the deal.My Dart is running 7.20's @94 in the 1/8 and 11.40's @113in the 1/4 ,best 60' is 1.60.Im considering just turning it into an 1/8 mile car cuz thats whats in my area and raced 90% of the time.Heres my specs.

Motor:Very mild 10 to 1 408 with a .480 lift hyd cam.It is running completely out of cam at 5700 or so and i shift at 5800.

Trans: Powerglide ,with a manual valve body ,trans brake ,and im able to stall it to about 3600 on the trans brake or about 2500 on the footbrake.I think it has a 1.76 low gear in it.

Rearend:8 3/4 , 4.10 gears ,35 spline axles with a spool,and im running 26x8.5x15 slicks on it.

The car weighs 2795 or about 3015 with me in it.

With the current 4.10's its killing it off the line with the high 1st gear in the glide ,and im crossing the finish line at 94 mph at about 4800 (way before its redline of the cam at 5700).In the 1/4 its another problem im running out of gear before i get to the end (hence the sorry mph of 113),so a gear change is in order either way.I cam thinking that a 4.56 should get me about maxed out at 5900 or so in the 1/8 and mulitply the torque alot better off the line .The slicks seem to be able to hold the power now ,even with me using the brake .My 60 foots get better by about .05 with the brake versus footbraking ,but its killing it trying to overcome the gears the way the are with the PG.Im thinking that a 4.56 versus the 4.10 in my combo ,may get me a few tenths in the 1/8 and a better 60'.I know a 3spd auto would be the best answer ,but im sticking with the Glide ,so i am just gunna try and make the best of it .What do think ???

Sorry but i'm not understanding the whole picture .
Maybe why you haven't got any responsed yet .

Transbrake is a valvebody and your launch is decided on launch chip .
Racers that go with a P/G are trying to take the low end out the cars launch .

I'm surprised you can't get 6000 or better out of Motor even with hydraulic cam but maybe not enough for a 408 for sure.
more gear would help .
good luck .
DR

I think your stall is way too low for the torque
range and like it was said the revs seem low, check
the springs..... JMO

I agree that you need more gear for the 1/8 mile,of course you wont be able to run the 1/4 if you do so. The cam(guessing the duration) and RPM range sound about right,I'm not suprised it's dead by 5700rpm at all. I'm curious about the combo,if you want to PM me I'll be glad to give my

I think it a pretty well sorted out combo really. The Hyd cam will be the major limiting factor beyond this point. Throwing gear at it will help a little, but if the engine cant support the extra rpm at this points, its kind of a waste. The Glide works well but IMO your giving up some E/T with the converter and the inability to launch and shift the motor in the sweet spot...The car isnt super heavy, and it isnt super light either, combine that with the high geared glide first ratio, and IMO your leaving some e/t on the table..Id be looking to turn up the wick to gain some of this back, but again the cam isnt going to let you.

Put in a 904 with a low first gear set and call it good

Now we know why the 408 has a P/G .
Put more gear in would be the cheapest .
More convertor as Mr p said .
Changing cam might run into V/p issues .
If you are ready to run this year just go
get it done.
Don

IMO why change anything just because you are running the 1/8??? Consistency & RT are still the answer to winning, not the speed.

As long as you stay with the glide, it will be soft on the bottom. A good combo change would be a solid lifter cam to change the rpm capability's, allowing more rpm in the lights combined with a steeper rear gear. Might even consider a converter change, to match a new cam, but that might not fit into what you want to spend?
The head flow and intake system will have a lot to do with how much more rpm you can get out of it. But you should be able to go at least 6200 rpm in the lights with a flat tappet cam and what you have.

The 4.56's would be a step in the right direction.Cam change should be on the list of things to change and a good solid lifter cam would really help things out.Before you go for a new converter or anything else for the trans you must decide if that trans is what you want to stay with.A 904 and converter would be the way too go,but that's going to cost some $$ to do unless you can get a good used one and you should be able to find one here on the board for sale when the time comes.You'll have to do this at the time you change the cam as it'll be a real dog off the line with the low stall.

Thanks guys for the good positive help.It looks like im gunna go with the 4.56 gears as planned .I am gunna run it with just the gear swap first,then im gunna upgrade the cam and valve springs next.Im not wanting to break a record with this old Dart ,im just wanting to get it flirting with the 6's in the 1/8 and have sum fun.Im only a few tenths away ,so i think its achievable . Thanks again ...

IMO 4:56 won't get you the 1100 RPM at the finish line you're looking for. If you're changing gears on it for 1/8th runs I'd go with 4:88 or 5:13 then adjust tire size to get the RPM where you want it at the stripe. Just my