Re: Can I change my 88 spl into a 120????
Fastbullet is correct. The later 120/140's are big bore loopers. Completely different engine. When compared to the older 140 crossflow engines, though similar-even those blocks are different. The 140 has different porting and has the bubble back exhaust. Not easy to convert your 88 to that configuration. You can add the older high compression heads and the larger 1 5/16" carbs. Those are bolt-on hp additions. (you will probably have to rejet the carbs somewhat.) Also, add the rubber intake filler blocks by the reeds. (they are good for 3-5 hp, but are NLA-so you will have to scrounge around for them.) Composite reeds are also a nice addition. You may get it up to 125 crank hp with the bolt-on adds.
