Quote Originally Posted by 50sFlash View Post
I found an easy 5 bolt-on horses.

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I was told the 40 is a better powerhead to modify because it has bigger crank journals. Thoughts anyone?
I dont know about the crank but typical of johnny-rude to put a different crank in a motor that looks outwardly the same as another.. Ive got 2 31.8 35s apart, 1 has a better crank but I found the labrynth seal to be bigger on 1, same otherwise.
Got a Lark 35 & a '60 40 like yours, on the same boat the 40 had a slight acceleration edge but no top speed increase.
Ive thought also about the reeds, been told "not worth it", "well worth it" & "if one breaks your motor wont get hurt". What I do know is that experimenting with reeds makes a difference.. I made a jig to bend stops a little, got a little performance, bent some more & got a new piston. They will break but till then the motor will do 3-5 hundred Rs more under the same load. Thats an argument for trying composites but I havent $prung for em yet...Or discovered my being a long lost Rocker-feller. lols