I know I've seen some people questioning if these heads are any good, who makes them, where to get them, etc. so I thought I try to shed a little light on the subject.
1st. They are available through PBM-Erson, otherwise known as Engine Parts Warehouse. I'm not quite sure how it works, I see they list them on their website, but I know they don't sell to private parties, only machine shops through the contacts I use.
2nd. They are built by Dart, not chinese knock offs. For some reason it seems people think PBM is selling cheap (quality wise) parts, but the heads I just got are Darts, the crank and rods are Scat (relabeled as PBM), their line of forged pistons are Mahle. Everything I have purchased has been first rate stuff.
3rd. I guess I'm sounding like a commercial for PBM/EPW which is not my intent. My only affiliation with them is I buy and use many of their parts in my shop.
4. I just put together a 350 using these heads (the vortec version), the above mentioned rods, some speed pro hyper pistons, roller cam, Pro products intake, etc. and just dynoed it this morning. Using a 770 holley, pretty mild cam (can idle pretty nicely at 750 RPM's) this motor pulled over 400/400 and the torque curve from 2800 up is over 400. It runs out of steam at about 5200 but that is fine, this is going into a street driven car, running pump gas only (9.6:1 compression).
If you have a chance to pick up a set of these heads, I'd highly recommend them. They have bigger chambers than a stock vortec heads, around 69-70 CCs out of the box, so you should be able to keep a reasonable compression even with a 383 or 400.
1st. They are available through PBM-Erson, otherwise known as Engine Parts Warehouse. I'm not quite sure how it works, I see they list them on their website, but I know they don't sell to private parties, only machine shops through the contacts I use.
2nd. They are built by Dart, not chinese knock offs. For some reason it seems people think PBM is selling cheap (quality wise) parts, but the heads I just got are Darts, the crank and rods are Scat (relabeled as PBM), their line of forged pistons are Mahle. Everything I have purchased has been first rate stuff.
3rd. I guess I'm sounding like a commercial for PBM/EPW which is not my intent. My only affiliation with them is I buy and use many of their parts in my shop.
4. I just put together a 350 using these heads (the vortec version), the above mentioned rods, some speed pro hyper pistons, roller cam, Pro products intake, etc. and just dynoed it this morning. Using a 770 holley, pretty mild cam (can idle pretty nicely at 750 RPM's) this motor pulled over 400/400 and the torque curve from 2800 up is over 400. It runs out of steam at about 5200 but that is fine, this is going into a street driven car, running pump gas only (9.6:1 compression).
If you have a chance to pick up a set of these heads, I'd highly recommend them. They have bigger chambers than a stock vortec heads, around 69-70 CCs out of the box, so you should be able to keep a reasonable compression even with a 383 or 400.