2 bolt or 4 bolt main?
2 bolt or 4 bolt main? 
05-23-2008, 03:24 PM
#6
Banned
Join Date: Feb 2008
Location: I moved to over there
Posts: 325
Likes: 0
Received 0 Likes
on
0 Posts
The LT1 was first available in a Corvette in 1992. In 93 it was available in a Camaro, and in 94 it was available in a Caprice. Not a big deal just wanted to make sure someone didn't think it had an LT1 (not stock anyway)
Good luck
Good luck
Trending Topics
05-23-2008, 03:27 PM
#8
Staging Lane
Thread Starter
Join Date: Dec 2007
Location: New Albany, Ohio
Posts: 91
Likes: 0
Received 0 Likes
on
0 Posts
yea i know its not a lt1 cause its throttle body injected instead port injected like the vetted and fbodies. we would have a whole bunch of problems if lt's were TBIs haha
05-24-2008, 07:19 PM
#11
05-24-2008, 09:09 PM
#13
Teching In
Join Date: Oct 2007
Posts: 1
Likes: 0
Received 0 Likes
on
0 Posts
Actually, the commonly called "lt4 blocks" which were nothing more than the lt1 4 bolts were stuffed in many a LT series supporting vehicles.
I've pulled a many LT1 from mid 90's "cop car" Caprice's and 1 out of 16 would be a 4 bolt. On the other hand, many a '97 Camaro/Firebird had 4 bolt blocks. Reason being is the introduction of the LS1 in the '97 Corvette's while the Camaro/Firebird held on to the LT1 for one last year. For GM to deplete the stock, a whole lot of "LT4" blocks were used for the Camaro/Firebird setups in '97. In fact, on a very rare occasion, you'll find a '97 Camaro/Firebird with LT4 heads too. Most mid '90's "police interceptor" LT1 Camaro's had 4 bolt blocks.
I've got a virgin LT1 4 bolt block that I've debated about selling or using. I really don't know what the going price is for such but they are rare so it seems and I paid $250 for the last used old skool 4 bolt 350 block I bought as they are becoming just as hard to get. This virgin block came from a '97 Camaro.
I've pulled a many LT1 from mid 90's "cop car" Caprice's and 1 out of 16 would be a 4 bolt. On the other hand, many a '97 Camaro/Firebird had 4 bolt blocks. Reason being is the introduction of the LS1 in the '97 Corvette's while the Camaro/Firebird held on to the LT1 for one last year. For GM to deplete the stock, a whole lot of "LT4" blocks were used for the Camaro/Firebird setups in '97. In fact, on a very rare occasion, you'll find a '97 Camaro/Firebird with LT4 heads too. Most mid '90's "police interceptor" LT1 Camaro's had 4 bolt blocks.
I've got a virgin LT1 4 bolt block that I've debated about selling or using. I really don't know what the going price is for such but they are rare so it seems and I paid $250 for the last used old skool 4 bolt 350 block I bought as they are becoming just as hard to get. This virgin block came from a '97 Camaro.
05-25-2008, 01:58 AM
#14
On The Tree
Join Date: Dec 2001
Posts: 197
Likes: 0
Received 0 Likes
on
0 Posts
Actually, the commonly called "lt4 blocks" which were nothing more than the lt1 4 bolts were stuffed in many a LT series supporting vehicles.
I've pulled a many LT1 from mid 90's "cop car" Caprice's and 1 out of 16 would be a 4 bolt. On the other hand, many a '97 Camaro/Firebird had 4 bolt blocks. Reason being is the introduction of the LS1 in the '97 Corvette's while the Camaro/Firebird held on to the LT1 for one last year. For GM to deplete the stock, a whole lot of "LT4" blocks were used for the Camaro/Firebird setups in '97. In fact, on a very rare occasion, you'll find a '97 Camaro/Firebird with LT4 heads too. Most mid '90's "police interceptor" LT1 Camaro's had 4 bolt blocks.
I've got a virgin LT1 4 bolt block that I've debated about selling or using. I really don't know what the going price is for such but they are rare so it seems and I paid $250 for the last used old skool 4 bolt 350 block I bought as they are becoming just as hard to get. This virgin block came from a '97 Camaro.
I've pulled a many LT1 from mid 90's "cop car" Caprice's and 1 out of 16 would be a 4 bolt. On the other hand, many a '97 Camaro/Firebird had 4 bolt blocks. Reason being is the introduction of the LS1 in the '97 Corvette's while the Camaro/Firebird held on to the LT1 for one last year. For GM to deplete the stock, a whole lot of "LT4" blocks were used for the Camaro/Firebird setups in '97. In fact, on a very rare occasion, you'll find a '97 Camaro/Firebird with LT4 heads too. Most mid '90's "police interceptor" LT1 Camaro's had 4 bolt blocks.
I've got a virgin LT1 4 bolt block that I've debated about selling or using. I really don't know what the going price is for such but they are rare so it seems and I paid $250 for the last used old skool 4 bolt 350 block I bought as they are becoming just as hard to get. This virgin block came from a '97 Camaro.
Interesting about the LT4 heads on F-bodies. did these have red LT4 intakes as well? or do the runners not match and they used LT1 intakes? Seems like a serious problem or an obvious red-intake... I have my doubts about that being from the factory.
My late-97 Trans AM had a 2-bolt bolt and the newest LT1 heads when it shipped... but no LT4 stuff.
LT4's were not completely depleted from GM stocks when the '97 LT1s left the factory. MANY LT1 and LT4 blocks were available from GMPP or for warranty replacements.
I know of several accounts of b-bodies getting 4-bolt mains though, that is true as far as I know.
The big debate of course is wether converting a 2-bolt to a 4-bolt main should be done with splayed caps, or with straight caps. I went splayed, but some prefer straight caps like the factory used on 4-bolts (due to the internal webbing being similar to what's seen in bowtie blocks instead of the weaker Gen I blocks). Probably not a big difference anyway once you go aftermarket caps (like the ProGrams).
05-30-2008, 08:03 PM
#15
Actually, the commonly called "lt4 blocks" which were nothing more than the lt1 4 bolts were stuffed in many a LT series supporting vehicles.
I've pulled a many LT1 from mid 90's "cop car" Caprice's and 1 out of 16 would be a 4 bolt. On the other hand, many a '97 Camaro/Firebird had 4 bolt blocks. Reason being is the introduction of the LS1 in the '97 Corvette's while the Camaro/Firebird held on to the LT1 for one last year. For GM to deplete the stock, a whole lot of "LT4" blocks were used for the Camaro/Firebird setups in '97. In fact, on a very rare occasion, you'll find a '97 Camaro/Firebird with LT4 heads too. Most mid '90's "police interceptor" LT1 Camaro's had 4 bolt blocks.
I've got a virgin LT1 4 bolt block that I've debated about selling or using. I really don't know what the going price is for such but they are rare so it seems and I paid $250 for the last used old skool 4 bolt 350 block I bought as they are becoming just as hard to get. This virgin block came from a '97 Camaro.
I've pulled a many LT1 from mid 90's "cop car" Caprice's and 1 out of 16 would be a 4 bolt. On the other hand, many a '97 Camaro/Firebird had 4 bolt blocks. Reason being is the introduction of the LS1 in the '97 Corvette's while the Camaro/Firebird held on to the LT1 for one last year. For GM to deplete the stock, a whole lot of "LT4" blocks were used for the Camaro/Firebird setups in '97. In fact, on a very rare occasion, you'll find a '97 Camaro/Firebird with LT4 heads too. Most mid '90's "police interceptor" LT1 Camaro's had 4 bolt blocks.
I've got a virgin LT1 4 bolt block that I've debated about selling or using. I really don't know what the going price is for such but they are rare so it seems and I paid $250 for the last used old skool 4 bolt 350 block I bought as they are becoming just as hard to get. This virgin block came from a '97 Camaro.
) Im planning on building a procharger motor in the next year and that would help out a lot if it is. 
