Originally posted by hambiskit
When you run only put 5 gallons of gas, and 1/2 gallon of RC car fuel- it's pure nitro, and you can get it from any hobby store.
Find yourself a set of double humps, and get a winder cam- solid lift/ with lifters, and don't go too big on the lift because that's a pop-up motor, and you don't want your valves to smack the domes- so plastigage it in case you have to cut your reliefs. Ask your manufacturer for reccomendations on lift.
Can you port & polish? You'll want to open up the exhaust side and swirl port the pockets- the intake runners are good on those heads like they are. Get the intake valves cut to 202's if they aren't already- balance the rotating assy. well, and polish the crank if you have time.
Stock CR for the 327 was 11to1, with 461's it's going to jump up to about 11:8 to 1 if not more so you can count on trick fuel.
If your going to run automatic you'll need to have it gone thru for racing, and a HIGH stall converter will be needed.
If your going stick a no blow bellhousing, and a Kevlar blanket would be good- make sure that the break away's in the shifter haven't been replaced with bolts- I see this a lot. Dumb move.
And finaly install a loop for the drive shaft, and chain downs for the motor.

P.S. DON'T OVER CARB I would start with a 670cfm and jet up if needed
How can one use plasti-gauge for checking piston to valve clearance?? The nitro fuel you are talking about is for rc engines uses about 15-30% nitro,the rest is alcohol and oil of some type,.This fuel is for a 2-stroke engine.