Has any one use www.source.com located in california? they advertize in Mopar muscle. I am interested in the big block aluminum cylinder heads for 899.00$$.Edelbrock sells them for around 1,500.00 $$ What is the difference? gordy.

 

Ive used 440Source for quite a few things and will be ordering more from them for the next phase of my build. They ship very quickly, customer support is great, and they know their stuff. Very helpful people.



Are you refering to the "Stealth" heads? I am getting a pair as well. All the homework Ive done has lead me to believe, based on previous customers response, claims and dyno numbers, that the heads are a steal at the advertised price.

As for HP numbers…currently my 440 is running 8.2 to 1 compression with head flow at 220 cfm producing an est. 350-400hp. The motor, in stock form, is around 325hp stock with aircon/ exhaust manifolds/carter600/ crap ignition. I drove the car untuned..shes got it underneath the hood for sure…With the 440 source heads flowing at 290cfm it will be at 9 to1 with a hot street camshaft and probably be about 450hp..maybe 500. With better pistons and bigger cam , it’ll be almost hitting 500-550. After that it’ll need more displacement(stroker), an even bigger camshaft, and ported heads (330fcfm).

 

Got a set of the 440 source heads on my 71, and I'm really satisfied with them. Just know you use a different spark plug, it's a shorter 5/8ths plug, and make sure you use the washers to bolt them on.

 

Thanks for the info .THe correct web site is www.440source.com I see where they also sell aluminum roller rockers for those same heads. What are the advantages and disadvantages?Not being real familiar with this set up, I think the cam would have to be replaced.This would be for a street set up(71 dodge charger).Here in pa. always looking for a winter project when the snow flys. Gordy.

 

WITH ANTI-SEIZE!!!!!!

 

Amen, I forgot to say that. I've got a can of the copper sitting here and it's just gotten to be such a given to me that I passed it over.

 

They may say that you have to use the aluminum roller rockers or adjustable rockers, as I did with my Edelbrock heads, they have some of the most inexpensive adjustable rockers I could find.

 

just wanted to pass on some info i experienced then heard about to back up what happened to me. helped a guy build a440. got real hot on start up, had to shut it down low or no coolant flo. put a hi flow alum. pump and t-stat in tried it again, got so hot it shut down. recored the rad. no t-stat. 50-50 mix on anti freeze, tried it again. got hot and spun 3 cam bearings, and 2 rod brg. got a different block built it again, put a stock cast hsg. on it ran great. it had a 440 source alum. water pmp. hsg. on it when it kept getting hot. a buddy told me a year later,a thread on the 70 charger site, a guy wsa having bad over heating on a new 440, same deal. took the 440 source hsg off, compared it to a cast 1 found out the inlet openings were half the size of the cast 1. just words of exp. be carefull what you purchase from them.