I bet it will run better with the 650 than it will with the 750. Stock convertor, stock cam.

Sheldon

you didn't mention your manifold but either way a 650 on a 383 auto car is pretty sweet.

You guys are nuts!!! Drop a 1050 Dom & don't look back...............



JK, the 650dp will be fine.

right now the engine is all stock including the cast iron 4bbl intake. i would love to build this up as a "FAST" style engine build but i don't know if its in the budget. so most likely its going to get a mopar 528 mechanical cam and true flat top pistons and have the heads ported, but keep the stock sized valves. again i'm not looking for all out race performance just a good driver thats got some power under the hood. i think about 450 hp will be plenty. i don't see this engine revving past 5500 any time soon either.

and yes its an auto with a stock converter but i will change out the coverter once i get the engine rebuilt. and the trans will get a shift kit just firm up the shifts some.

My friends 440 made quite a bit more power than it oughta... had pretty good top end too... that was a Holley 670 Street Avenger that i tuned for him. My 440 was the same way... junk that ran like a built engine... that was only a 750. That 650 with a solid tune should be fine, especially for what you're after and with what you have. When the time comes and you need more, if you're a tuner, you can get quite a bit more airflow out ov that 650 even. There are quite a few lil tricks that will net you more CFM and you can get into the 700's without buying a new body or carb... yet, you'll still have the small-carb driveability. My friend's 440 always did daily-drive a bit better than mine did.

I've always been a fan ov doing the most you can with the least. Anyone can dump on an 850DP and run, but the car will like the smaller carb almost every time, and in many cases run quicker anyways.

All that said, if you happen across a nice 750 i'd pick it up... but theres no rush to do so.

Had a Holley 670 Street Avenger on my '68 road runner with an old Edelbrock DB4 intake and a Comp Cam and stock exhaust manifold and Ultra Flo's.....BEST combo I ever had...changed the PV's up one size and drove it and drove it and just a no hassle turn key set-up. Liked the Holley 670 so much on the 383, when I got the '69 GTX 440 I put a Holley 770 SA on it right away...same result "plug and play"

Go to Advance Auto and order the Holley online and you save on shipping and usually there's discounts on over a certain amount purchase or most of the Adv Autos will price match even places like Summit's price and as I said no shipping charges. There's also links to Advance Auto discount codes/coupons.

I just bought a proform 750..dual feed/double pump/electric choke/bowl sight glasses,easy air bleed change for 439 delivered. 750 will run well on your 383 and even better with the future mods mentioned