1970 3963512 Block Strange One

[69L72RS]

What date range was the first batch of engines (454 CID) made.
I have a 454 2-bolt block coded T0806CGV.
Just curious.
Eric

[Mr70]

The CGV was a 345HP engine.
I've not seen any 345HP's w/4 bolts yet,so far only 2-bolt mains.
The only EARLY casted 1970 non LS-6 coded 512 4-bolt blocks I've seen so far were 390HP engines slated for Impala-Police & Taxi useage.

[olredalert]

------A couple of years ago I pulled two oval-port 351 67 dated complete engines out of a completely dry-rotted Pacemaker boat. They were both 4-bolt main along with the oval-port, but one was reverse rotation. Both were very low hour, beautiful standard-bore pieces, and, although low compression had the good rods and crank. Both the blocks are sitting in restored 67 Corvettes today........Bill S

[nuch_ss396]

Bill,

Were the piston domes on these marine engines the standard 10.25:1 design? With oval ports, I would expect so.

[3macs1]

Steve:
I am not sure if it had a 6223 crank. I asked specifically on the dimpled rods and pistons and he told me the shop that is rebuilding it told him they were just standard oval port but the crank did not have to be cut and was forged.
Also the air cleaner never had a 345 hp or 390 hp decal on it, just 454 and that was original. It was a fully loaded impala that my grandmother remembers was a salemans demo with 2000 miles on it when they purchased it in early january of 70. So it was a early production.They wanted the big engine to pull a camper.
The car was loaded with air, ps,PDB, tilt, PS, PW, PL, rear defrost,8t,posi, fender skirts, delux belts,remote mirrors, etc.

[nuch_ss396]

[ QUOTE ]
.....They wanted the big engine to pull a camper.... .

[/ QUOTE ]

OK, silly question time. Did the full sized cars come with
a towing package if ordered? If so, would that possibly
incorporate a 4-bolt block? I've never heard of this before
myself, but you never know.

Steve

[olredalert]

Steve,,,Definetly had low domes, if they had any domes at all. I remember thinking that a guy could run just about any gas with those pistons. Pacemaker had there own engine program of sorts. I believe they built them to have as much torque as possible while still using regular gas. These engines were painted metallic green and were prominently labelled as "Pacemaker 427s"........Bill S

[olredalert]

------You have me there, Steve. I dont remember what the pistons looked like probably because they were going to a dumpster anyway......Bill S

[nuch_ss396]

OK - high or low domes?