1975 L-48
Thread Starter
Intermediate
Joined: Sep 2007
Posts: 34
Likes: 0
Boys Boys Boys
The car is a 4 speed. I'm definitely pulling the motor out ( 91K miles and it leaks oil from somewhere) Won't know about the pistons till I measure everything. I'm an a/c mechanic, I've rebuilt a couple of small blocks, mostly a little bit better than stock. I can take 'em apart and put 'em together, only want to do it once. I don't know much about the numbers ( head cc, cam duration/ lift ) I do know compression ratio , but I also know too much is no good. I'm lookin' for somebody to recommend the complete package that they know runs good and is not to radical. My car is 32 years old. Looks quite good and handles o.k. I've had a 95 coupe LT-1 and I still have a 98 ragtop ( auto 350 h.p. my wife can drive it to get her hair done) but if you get up on it, it's pretty much a little rocket, handles a lot better than the 75 too. Thanks for your input. Keep in touch.
Markeymark
The car is a 4 speed. I'm definitely pulling the motor out ( 91K miles and it leaks oil from somewhere) Won't know about the pistons till I measure everything. I'm an a/c mechanic, I've rebuilt a couple of small blocks, mostly a little bit better than stock. I can take 'em apart and put 'em together, only want to do it once. I don't know much about the numbers ( head cc, cam duration/ lift ) I do know compression ratio , but I also know too much is no good. I'm lookin' for somebody to recommend the complete package that they know runs good and is not to radical. My car is 32 years old. Looks quite good and handles o.k. I've had a 95 coupe LT-1 and I still have a 98 ragtop ( auto 350 h.p. my wife can drive it to get her hair done) but if you get up on it, it's pretty much a little rocket, handles a lot better than the 75 too. Thanks for your input. Keep in touch.
Markeymark
Racer
Joined: Mar 2005
Posts: 334
Likes: 5
Boys Boys Boys
The car is a 4 speed. I'm definitely pulling the motor out ( 91K miles and it leaks oil from somewhere) Won't know about the pistons till I measure everything. I'm an a/c mechanic, I've rebuilt a couple of small blocks, mostly a little bit better than stock. I can take 'em apart and put 'em together, only want to do it once. I don't know much about the numbers ( head cc, cam duration/ lift ) I do know compression ratio , but I also know too much is no good. I'm lookin' for somebody to recommend the complete package that they know runs good and is not to radical. My car is 32 years old. Looks quite good and handles o.k. I've had a 95 coupe LT-1 and I still have a 98 ragtop ( auto 350 h.p. my wife can drive it to get her hair done) but if you get up on it, it's pretty much a little rocket, handles a lot better than the 75 too. Thanks for your input. Keep in touch.
Markeymark
The car is a 4 speed. I'm definitely pulling the motor out ( 91K miles and it leaks oil from somewhere) Won't know about the pistons till I measure everything. I'm an a/c mechanic, I've rebuilt a couple of small blocks, mostly a little bit better than stock. I can take 'em apart and put 'em together, only want to do it once. I don't know much about the numbers ( head cc, cam duration/ lift ) I do know compression ratio , but I also know too much is no good. I'm lookin' for somebody to recommend the complete package that they know runs good and is not to radical. My car is 32 years old. Looks quite good and handles o.k. I've had a 95 coupe LT-1 and I still have a 98 ragtop ( auto 350 h.p. my wife can drive it to get her hair done) but if you get up on it, it's pretty much a little rocket, handles a lot better than the 75 too. Thanks for your input. Keep in touch.
Markeymark
The old adage was not to even do a valve job. That's very true! A mere lapping would be fine.
Now wait! old springs. Wait didn't get to the cam mod yet lol.
Well, in all honesty, if someone is in this boot, headers, 216 to 220 duration cam a performer intake and a nice Holley with a recurve DISTRIBUTER. There your up and torque. Now he has money for an exhaust.
The trick was not mentioned. After lapping the valves to seal and installing seals, instal a simple .030 valve spring shim under all valve springs. No measuring needed.
Hey, you can decrease compression or increase it with the head gasket lol
Good to go
