1C37W2RXXXXXX would not be possible as has been pointed out by Dale and Dean.
The only way to get a 454 was by ordering a 136x7 (or 13680) model and spec'ing Z15 on the order. The LS3 402 was the only big block engine possible in a 134x7.
x = 3 for hardtop or 6 for ragtop
The only way to get a 454 was by ordering a 136x7 (or 13680) model and spec'ing Z15 on the order. The LS3 402 was the only big block engine possible in a 134x7.
x = 3 for hardtop or 6 for ragtop