Street Cam Suggestions for a 340?
This is what I have, great street cam. 15-16" of vacuum at idle and works with your Air Gap RPM range. You will likely need a converter with it. My dad has the next size up in a 440 in his Coronet and its not bad on the street either but we both have 4 speed cars and 3.91:1 gears.
https://www.lunatipower.com/Product.aspx?id=2343&gid=287
Step down one size if you want to keep the stock converter, manifolds and 3.23:1.
That does sound pretty good for what was asked.
I'm working with the following.
stock 340, J Heads
Edlebrock Air Gap intake & Edlebrock 600 maybe 650 carb.
727 w/B&M shift kit stock converter at the moment, but I plan to buy a converter to match the cam.
3.23 suregrip
Mopar after market elec ign & dist.
flow master exh
possibly TTI headers if budget allows, at the moment stock 273 manifolds..
My goal is a solid running 350 to 375 hp 65 Dart cruiser. maybe occasional pass on the drag strip. Something that turns heads when pulling into the local cruise-in. a low 13sec in the qtr would be great..
With a very similar setup, my car was in the high 13s, 13.77 99.5 mph was the best. So I think you can get the ET, and don't lose sleep about the Hp unless you're into racing dynos (hey some are).
Weight with me was 3400 plus minus depending on fuel, spare, etc.
Tires were 24" diameter autocross tires. So this gives a gearing advantage although traction off the line was poor compared to drag slicks (any drag tire really) coupled with a rear body that will rise. We did snug the pinion snubber up which helped some..
Turbo/action 'medium stall' torque converter, foot brake test showed 3000 rpm stall.
Comp cams HE 280 cam. that's a 230/230 at .050, .480/.480 left IIRC.
Holley Street Dominator single plane intake manifold with 1/2 phelonic spacer.
Stock 340 ('68 style) aircleaner with K&N filter.
340 Cast Iron exhaust manifolds, 2.5" Turbo mufflers (probably dynomax but I'd have to check).
I drove it alot on the street, but would not recommend it or do it again. Better choices now that will provide more idle vacuum and a little less converter. It also means better torque at street rpms.
However I think its another good reference point for you. Obviously, good headers would be good for lower ET and higher mph. This wouldn't have helped the fact that its rpm going through the lights would still be below peak. On the dyno peak Hp was around 5500 - 5800 but it kept pulling right through 6100 without falling down.
Comp cams has a 'stock replacement' cam that looks interesting, nominally same intake and exhaust duration. Can't recall the p/n or name at the moment..
..found it
20-309-4 "Magnum Muscle"