What hurts this combo most?

[gt-351]

95 gt 351w, 9.1 comp dish pistions, GT-40 x303 heads 64cc, heads too small for trick flow 351w intake intake ports, crane h-286 cam,I want to make some changes. I have stock bottom end truck rods with good bolts.
I feel the heads are the a bigger prob than the comp ratio. Should I just leave it alone and get another tune for a 125 shot of gas? I have forged pistions. Thanks I just dont want to waste money in the wrong spots.

 

[nmcgrawj]

95 gt 351w, 9.1 comp dish pistions, GT-40 x303 heads 64cc, heads too small for trick flow 351w intake intake ports, crane h-286 cam,I want to make some changes. I have stock bottom end truck rods with good bolts.
I feel the heads are the a bigger prob than the comp ratio. Should I just leave it alone and get another tune for a 125 shot of gas? I have forged pistions. Thanks I just dont want to waste money in the wrong spots.

I would say that heads will defiantely wake that motor up...but i think 125 shot of gas would give you more power. Although it wouldnt be "power on tap" like heads are.

 

[bjl95mustang]

get some heads with a 56cc chamber.

 

[gt-351]

Should I mill mi vic jr's? I bought them used but in current form they flow
200 300 400 500 600 700
int 130 188 237 264 273 267
exh 102 140 162 178 184 190
Will this be fine for a 5 spd car I mostly only to the track? I knew I can get more comp from the smaller chambers. Just wanted to add the flow # for your opinion.

 

[Grn92LX]

Victor jr heads are a very smart move. I would highly suggest a cam swap too. Go with a good custom cam. Are you using link bar lifters for a roller cam or are you using a flat tappet cam? The dish pistons are hurting you as well. The heads will need to be milled for optimum n/a performance. Don't forget valve springs!

The 125 shot of gas will really help out

 

[bjl95mustang]

Are your vic jr's the 60 or 70cc heads?

 

[gt-351]

I still havent cc'ed them they have been shaved.How much I dont know. They were bought bare when they were new. Yeah , I need springs the heads were set up for a solid roller that had over .700 lift.

 

[bjl95mustang]

If they are the 70 cc heads i would sell them and get something else.

I have vic jr heads and the 60 cc head with stock hardware came up 63cc and my machine shop said thats norman becuase of the valves they use. I had mine milled and cc'ed to 57.5 and that got be to about 10.5:1 with mu setup.

 

[Hotrodsun]

I would get the victor jr's and maybe some 1.7 RR to help the cam out a bit.

 

[gt-351]

Cced the heads to night and they havent been shaved they were 60 cc's. What kind of hp increase do you think I'll see? Should this hepl tq too?