the sonic test info is useful but if you don't go .040", it won't help you any at the moment.
i also wouldn't line bore it unless it needs it.
.
He can do sonic testing and if it is ok we will bore cylinders to 040.
I wanted to stay at 030 originally and he said that it would cleanup however he prefers to go to 040... Anyways, I just have to wait until next week for him to tell me to order either 040 or 030 kit. I'll ask more about sonic test results and will consult with you here before making the decision.
I did some CR math here and these pistons that come with this summit kit are +3 CC . With 64cc heads and 0.040 gasket it will bring compression to 11.8
Way too much
I also found these kits online:
FORD 351(2.75")-393 SCAT STROKER KIT Premium Forged(Flat)Pist., I-Beam Rods
https://www.ebay.ca/itm/FORD-351-2-75-393-SCAT-STROKER-KIT-Premium-Forged-Flat-Pist-I-Beam-Rods/252417282217?hash=item3ac53e10a9:g:LWkAAOSwpLNX7srw:rk:10f:0&vxp=mtr
and this one
FORD 351(2.75")-408 SCAT STROKER KIT Forged(Dish)Pist., I-Beam Rods
https://www.ebay.ca/itm/FORD-351-2-75-408-SCAT-STROKER-KIT-Forged-Dish-Pist-I-Beam-Rods/331875910062?hash=item4d455881ae:g:hV0AAOSwzaJX7sqj:rk:25f:0&vxp=mtr
Could you give me your opinion? What CR should I aim for to stay on the premium pump gas?
Cheers
Alex