Any one done it. Ive been reading for like 20Hours now and have came here to see what people have done. If you have done it post your Specs. Im looking for 450Hp 450Tq(Give or a take) I have the 400 and it is torn down to the Block, going down to get Hot tanked and miked. If the Okay come back Im going to start. Thanks in advanced guys.

 

https://www.thirdgen.org/forums/engi...0-my-swap.html

 

Thank you. I Read the entire thread. Lots of good info. Now i have a few questions as i Build this Engine.

Here is my Combo,
Ive read a ton and I think this will be a Good combo. Correct me if im wrong. Money isnt really an object, as this is going to be a year long(ish) build, nothing over night. Id like to keep it mid range in price. Im looking for 450Hp. Let me know if this will work.
Heads- http://www.summitracing.com/parts/EDL-60899/
Intake Manifold- http://www.summitracing.com/parts/EDL-7101/
Cam- http://www.summitracing.com/parts/EDL-7102/
Rotating Assembly- http://www.summitracing.com/parts/ESP-B13460000/
Now im looking for a peak of 6k'ish RPM's. Only thing i think holding me back are the rod lengths. Any better ideas?
Roller Rocks/Pushrods-http://www.summitracing.com/parts/CMB-09-0024/
REfresh of Q's
1. Will this rotating assembly work for 6k max rpm?
2.What Carb. will you recommend(Im in Denver, CO) so about 5,000Ft. Elev.
3.Will this be a good combo?
4.Do i need to do anything to a Harmonic Balcener or just bolt it to the Balanced rotating assembly?

 

You will need the balancer and Flex Plate that came with your 400 block, and as for a carb, I'd go with the Edelbrock performer 750 style carb, it's a good compromise between gas mileage and performance with excellent throttle response for a motor this size, and 425-450 H.P. with careful tuning will be no problem.

 

with my 406 i ran a set of double hump 202 heads and a lunati bracket master 2 cam. in a full weight 72 chevelle it ran 13.6s on a 650 carb

you should look into a different cam as the edelbrock is junk, you will be very unhappy with it. the cam i used was a 480/480 lift cam, i would look into this cam, it was very streetable also

as for rotating assembly, i would get it internally balanced just to bee on the safe side and then you could rev it to 6500 or more safely

i would stay away from edelbrock carbs though, i bought an engine from blueprint racing that was "already dynoed," i put it in the car and under full throttle it falls on its face, this was after them sending me a replacement also. get a holley and you will thank yourself

 

Don't get me wrong here, but with the torque his 406 should make to 6,000rpms(no higher, so internal balancing not needed here, save your money) if he hooks, should run quite well with what he has selected, now if he had mentioned things like gearing, stall speed convertors, curb weights, being anything other than close to factory stock, I would have changed things up, but I think he's gonna have power brakes(need vacuum for that) bigger cams need proper gearing and correct stall speed selection and with that, out goes drivability! Now when I was in my early 20s, we would take junk yard 400s throw Comp 292 magnum cam, lifters and springs in w/fuelie heads, victor Jr. $125.00 headers, B&M shift kit w/a Vega torque convertor and go mid to low 12s driving to and from the track with gearing anywhere from 3.73s to 4.10s, but that was back then, and the Edelbrock/Carter carb makes great throttle response and can manage good gas mileage when properly jetted, this carb is an alternative to a factory Quadrojet which in my eyes is better for his application, but sure a Holley is better, but for heavily driven street cars, they don't hold a candle to a Quadrojet or Carter carbs for gas economy, throttle response or durability! "Remember tuning is everything" (Engine & Suspension)

 

its funny you mention that converter, im using a v6 converter

also your right there is a big difference in weight between the cars, the car currently runs 9.80s full weight with a 406 that revs to 9200. but this is an internally balanced engine.

i have personally ran the 2 edelbrocks and have had 1 other friend use one and neither of us had luck with them, had same problem i did, car fell flat on its face at wot. when we called blueprint they said "theonly reason they use them is because they are idiot proof, just bolt them on and go."

with that cam i was seeing around 15in/hg so i had great brakes.

i would look into this forum more about that cam though, many people here would say the same thing about it

 

Just my ....but I would go with a air gap style intake...Also check out the Professional Product intakes, They flow just as good as an Edlbrock and are alot less money....I have also built a 400 based SBC, check out my F-Quick page in my sig. and you"ll see my list of goodies....there has been a few changes but it's basicly the same.....good luck with your build...

 

Hell yeah, excellent point, a good dual plane is what he needs at his rpm level, and the Professional products Hurricane & Dual plane are priced right and need very little work to make power.