"Slighty straightened" looks like an understatment..A&M Sachs 2.6....If the crank has a small hole in the center it's a Sachs crank, good, if no hole it's an A&M crank, bad...The hub is hollow and is easily bent, but to be that crooked the crank is probably bent and twisted.....The original carb was a Walbro WT76A, about $40.00 new....The block under the carb was bakelite, no problem to replace....