75 block or 90 block
Thread Starter
Racer
Joined: Sep 2004
Posts: 495
Likes: 1
From: Spokane Washington
75 block or 90 block
Your thoughts. I.. need to build a motor for my 69. I have the original motor but I’m not ready for it yet. So in the mean time I am going to build a roller cam motor. I have a 1975 sbc 2 bolt. Complete and I can get a 1990 l98 corvette motor for $800.00. both need rebuilds,. Is the newer block worth it if all else is equal. I will switch to carb. I know the roller conversion is more involved in The 75. The l98 has the roller cam provisions, and a drilled manual fuel pump. I have a set of trick flow double hump heads to use. Looking for 350 plus’s hp.
is the newer block worth the 800
or is there a better way
I'm doing the work except for machining, so cost isn’t going to be too high, I have the heads
thanks for helping
cal
is the newer block worth the 800
or is there a better way
I'm doing the work except for machining, so cost isn’t going to be too high, I have the heads
thanks for helping
cal
Last edited by cal camara; Nov 10, 2021 at 05:45 PM. Reason: Wrong year
NCM Grand Opening Veteran
Joined: Sep 2005
Posts: 20,979
Likes: 384
From: South of giving a damn
St. Jude Donor '11, '17
Yes, I'd say it was worth the $800 for the roller block. The spider & dog bones removes the linkage between the lifters and I like the 1-piece rear main. The '75 block will easily produce the HP you are looking for, but you'll need the mentioned linked lifters & a button for the cam.
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,062
From: altered state
St. Jude Donor '05
A new GM block is roughly 1000 or so through Summit last time I checked
Going roller totally worth it in the long run. Like lots of older FTs but questionable quality of lifters/cam cores are hit and miss these days
Sucks Gm stopped making those great lifters.
Going roller totally worth it in the long run. Like lots of older FTs but questionable quality of lifters/cam cores are hit and miss these days
Sucks Gm stopped making those great lifters.
