Another piston option for the 273.
I have a 1965 Barracuda with a 273. Yes im strange im one of those guys who is going to keep this motor. However i have a real nice Scat crank. 3.58 If i use an oversize of .040 that will give me 302ci. The 273 rods are the correct length but i will probably go with scat rods for the strength plus depending on which way i go i may need to have either the rods re bushed or the pistons wrist pin bores honed out. Their is a company in Australia called ACL.
THEY DO NOT MAKE PISTONS FOR THE 273. But in Australia GM Holden did produce a v8 motor the 253. It was a smaller of two motors the other a 308. The 253 has the identical bore to the 273. Now ACL make race pistons for these little gems. They are cast in high silica alloy which negates the need for forged slugs, they are also 30% lighter than the stock units. Im sorry i cant remember exact figures but the wrist pins are slightly smaller in Dia than the mopar. I will use the speedway semi finished piston so i can machine the head as it is nearly 1/2" thick creating a slightly lumpy piston bringing up the compression. I will be making the pins fully floating. For you guys in the USA/Canada the prices should work out good as 75cents get $1.00 Aud. The standard GM pistons would be a bit short but the raised head racing pistons overcome that problem. There is a hugh selection of oversizes for these pistons.
Its worth a look at the catalogue shown in the photo here you can get the web address i think.
Good luck
THEY DO NOT MAKE PISTONS FOR THE 273. But in Australia GM Holden did produce a v8 motor the 253. It was a smaller of two motors the other a 308. The 253 has the identical bore to the 273. Now ACL make race pistons for these little gems. They are cast in high silica alloy which negates the need for forged slugs, they are also 30% lighter than the stock units. Im sorry i cant remember exact figures but the wrist pins are slightly smaller in Dia than the mopar. I will use the speedway semi finished piston so i can machine the head as it is nearly 1/2" thick creating a slightly lumpy piston bringing up the compression. I will be making the pins fully floating. For you guys in the USA/Canada the prices should work out good as 75cents get $1.00 Aud. The standard GM pistons would be a bit short but the raised head racing pistons overcome that problem. There is a hugh selection of oversizes for these pistons.
Its worth a look at the catalogue shown in the photo here you can get the web address i think.
Good luck