J heads are ideal however they came in a many different CC ranging from 72 CC to 63 CC find out what they are before you buy pistons cause compression ration is deturmined.
Good advice except, I have never seen a small chambered letter head ever come off a stock engine. Aren't those cc numbers NHRA max/min.'s?
By the CC on the head...example would be a 9.5-1 ration piston will be 9.5-1 using 63 CC but mid 8-1using 72 CC heads... price out aftermarket you might come across some nice heads for your motor...cam also has a lot to due with torque converter,rear gearing and tire size. ..chose your complete set up combo before building your motor... it don't matter how much torque your engine puts out.... it's how well you transfer that torque to your wheels.
Ouch, I have to disagree here on that one. Torque matters and on a driver as he askes for with a low HP out put, it is of mega importance.
Also look into using W2 heads...they come with lower CC chambers to compensate for low compression pistons due to smog in
Innnncorrect. The smaller chambers were designed per racers requests of a smaller chamber for higher compresion ratios, quench and custom chamber design.
NOT smog issues, though, they do solve alotta that.
,nice big valves,
inaddition they have a rocker ratio of 1.6 witch is a plus
The heads come rockerless so, purchasing rockers is now a choice. IMO, one should pick a cam based on the intended rocker ratio. Ramp speed can be ground in and takin to far with a ratio change from 1.5 - 1.6
call Crane Cams tech line
When did there tech line and bizness come back to life. I know S&S mototrs/engines, purchased them, have plans to bring them back from the dead, but that's alotta work for a motorcyle company to get up and going after they (Crane) went out of biz.
or comp Cams... they will be happy to help you select a cam. ...note that solid roller lifter and cams are now available for LA engine and do not require block modifications ... by comp Cams. ...
Theres a thread here where a fella ran into a mountain of problems with a Comp roller. I keep forgetting to book mark the thread. BUT, I don't think it was a solid cam.
When did Comp start making drop in rollers with NO mods at all? Last I seen was there bar needed a grinder to clearance them into the block.
Wan't that Korryliss that had the issue and his MP 340 resto block?
IIRC, grinding the wall ended in a window and the lifters still didn't clear the blocks wall.