so...the boy decided to run in third gear instead of fourth.....as he let off for turn one there was silence then a boom. When checking for damage, we found a nice fist sized hole in the block and the remains of a rod or two...oh well. We(I) found another motor had it ringed and bearinged it but it wont start......I've looked at the trigger wheel(right side crank end cover) and it looked exactly the same but I did use a different cam sensor(the other got broken).....any ideas? This sux and the season starts in two weeks...different motors (same year) use different sensors? am i just screwed here? help help!