OK guys I am guilty of buying a set of procomps.

I was surfing EBay a few days ago and saw an add for the "dreaded procomp" cylinder heads. They were complete with valves and springs and seals everything. Well I through in a bid for 510.00. I ended up getting them for 695.00 for the pair. When they arrived after looking them over the first place I took them to what is a very respected machine shop in my area. He has seen these heads before and said they don't flow too good out of the box. The first thing he noticed was it looked like they put in 2.19 intake valves without opening the seats. I told him to do a flow test to see what they flow as I got them. Them do a proper valve job and generally what he calls a "pocket port job" on them and then flow them again. They are going on my brother's 460 standard bore Fox bodied coupe. The heads on it are milled D3's with the EGR bump ground off and they have cobra jet size valves in them too. Other than that they are bone stock. We know what the car runs in the 1/8th as he runs it almost every weekend every summer. It is a high 6 to low 7 depending on the weather car at around 100 mph. I am loaning these heads to him and other than losing about 60 lbs. this will be a good test to see if he gains anything other than the obvious improvement from weight loss. I know the reputation these thing have and if they don't really help I will put them on my 521 powered F100 short box 77 street truck. I know they would work a bit better than the bone stock D3's on it now. At least this should be a good and interesting deal at my expense of course . I will post the results when I get the heads back and then later this summer the et and speed improvements or or even the negative results if that happens. I will also post my total price that I will have in them when all is done.

I hope you are going to post the before and after flow numbers when you get them.

Yup I sure will do that.

hell, I would like to know as well

Im interested in the results as well incase I ever come across a cheap pair. I'm not big on having aluminum heads on a big block unless it makes real power.

Shame on you.

The problem with these heads are many. They didn't do a good job with the architecture. Very difficult to improve on a bad design. Their 351C head is actually pretty good. Too bad they missed with BBF head.

57custom, I'm also going to need a lot of info on the 63 Fairlane you have in your avatar. I have a few of those hanging around my house, and I'm interested in what people are doing with theirs. Not sure why it took so long, but they are getting very popular, always have been to me.

My 63 is powered by a 545 pump gas BBF with the Kasse redesigned cobra jet heads, It has a C4 and a nine inch of course. I also put in a Mustang 11 front suspension. I did that before the popular crossmembers to do it came out. I used a genuine old must 11 and eliminated those ugly shock towers. Lots of room for headers now. I have a 1050 dominator on it and a mild solid roller cam in it that Scotty at reincarnation speced out for me. A lot of the parts were purchased from the vendors on this forum. The best the car has run is 10.20 at 133 mph. usually runs from the low 20's to mid 30's at right around 129 to 131. A fun car fully street legal and weighs about 3510 with me in it. I made the headers and even narrowed the rear slightly myself. The rear gears are 3.70's with 28 x 10.5 mickey thompson slicks. I put mini tubs in it too made them from trailer fenders from fleet farm. I did all the bodywork except for spraying the car. We just rolled it outside on a decent day and shot a basecoat clearcoat paint job on it and it looks pretty darn good for a 600.00 paintjob. When I was at one of the (pinks all out) there was only one other 63 Fairlane there.

on the Pro Comps yesterday and here are the the before numbers as they came out of the box. By the way my head guy said it looked like they did just put in the cobra jet valves without making the seats bigger.      

100  200 300 400 500 600 700
71    149 221 261 278 285 286      this is with the 2.190 valve

100  200  300  400  500  600 700
52   107   135  160  170  171  171  this with the 1.710 valve.

 I should have the pocket ported and valve refitted results around the end of next week.

Here are the prices and things done to these heads to basicly make them work properly. Competition valve job 190.00. Flow study 55.00. Machine for 219/171 valves 110.00. Back cut the valves 29.00. Pocket port 225.00. CC chambers x 2 38.00.

Flow numbers are

100   200   300   400   500   600   700       intake
76    146    220   282   307   309   309

60    112    160   188   205   208   209      exhaust

Total is 1339.00 not counting shipping when I bought them. I will take them down to my brothers place this weekend and he then will
put them on his car and after that I will have the actual results of improvement or loss of speed and ET after he takes it out this year.
I think this will be interesting as we all know it will be at least 70 lbs lighter. Subtracting the flow study and CCing the chambers makes
it 1246.00. I will lean on my brother to get the heads changed so we can see the final result

Bret Powell did some work on mine about 8 years ago, came up with the same numbers.
I was in the 11.80-11.90 range with a 429 and 3700lbs cougar.
I have since sold em and got some TFS 325 power ports.

cheatham wrote:Bret Powell did some work on mine about 8 years ago, came up with the same numbers.
I was in the 11.80-11.90 range with a 429 and 3700lbs cougar.
I have since sold em and got some TFS 325 power ports.

and what was the difference in performance in the two heads????

I dont have a comparison for the two, updateing the 429 with a 4.3 stroker. Still in the building stage

It is the end of the season needless to say up here in Mn. So I got the info I promised from my brother on the best et and speed for the combo. This season with the heads I have described he went 6.55 at 105 mph on a decent night. So I think it is safe to say we gained about 3 tenths in the 1/8th.