[rtaylor3410]

Looks like the 305 is nhra rated at 180hp and would be a natural R/SA

P. Disp. C.R. Ind. Make Model/Transmission Manifold R.R. Lifter Head cc Notes
105 231 9.25 1-2 Roch 17057145,447/SM 1254143 1.53 H 42.70 1,4 Odd Fire
105 231 9.25 1-2 Roch 17057145,447/SM 1257119 1.53 H 42.70 1,7 Even Fire
135 301 9.52 1-2 Roch 7057173,7057172 526213 1.50 H 69.90 3
140 350 9.61 1-2 Roch 7056140,7056143 1249167 1.55 H 50.00 4
145 305 9.24 1-2 Roch 17057107,17057111 346260 1.50 H 59.10 8
155 350 9.61 1-4 Roch 17056246,17056546 1249169 1.55 H 50.00 5
170 350 9.06 1-4 Roch 17057250,3,5,6,8,550,3 411990 1.60 H 66.35 5
170 350 10.21 1-4 Roch 17057202,502 346249 1.50 H 63.35 6
185 403 9.18 1-4 Roch 17057250,2,3,5,6,7,8,550 411990 1.60 H 71.69 5

1 Alt carb - 17057143,148,448/Auto
3 Carb sizes - 1375/1218
4 Carb sizes - 1686/1250
5 Carb sizes - 1375x2250/1218xAV
6 Carb sizes - 1375x2250/1093xAV
7 Carb sizes – 1437/1093
8 Carb sizes – 1686/1186