found some X heads

No. Head Type Intake Exhaust
0.05 0.10 0.20 0.30 0.40 0.50 0.60 0.05 0.10 0.20 0.30 0.40 0.50 0.60
2 915J Fully Ported, 2.02" Valves N/A 62 130 186 239 272 277 N/A 52 101 132 166 173 178
4 Edelbrock Mildly Ported N/A 72 135 191 233 260 260 N/A 69 113 142 164 176 183
7 Edelbrock N/A 72 126 179 224 239 242 N/A 66 110 139 158 170 176
8 051 Fully Ported, 2.02" Valves 40 77 137 186 225 228 224 27 52 104 140 159 168 175
9 894 Stock 340X 32 58 125 172 208 221 210 22 45 95 122 135 140 142
10 915J Stock N/A 66 123 170 206 220 216 N/A 63 110 135 145 148 148
13 596 Stock 27 53 107 159 185 199 193 22 48 89 114 121 123 124
14 051 Stock 30 50 113 165 188 193 189 23 49 97 123 133 137 137

16 587 Stock 27 52 107 162 195 191 192 22 46 87 112 121 124 126


from what i see here the j and x alsmot flow the same stock.
and a fully ported 76 head cant touch a fully ported J head and the X head out flows my stock 76 head